CVE-2026-20100
Summary
| CVE | CVE-2026-20100 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-03-04 18:16:24 UTC |
| Updated | 2026-05-04 17:01:10 UTC |
| Description | A vulnerability in the LUA interperter of the Remote Access SSL VPN feature of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an authenticated, remote attacker with a valid VPN connection to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition. This does not affect the management or MUS interfaces. This vulnerability is due to trusting user input without validation in the LUA interprerter. An attacker could exploit this vulnerability by sending crafted HTTP packets to the Remote Access SSL VPN server. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition. |
Risk And Classification
Primary CVSS: v3.1 7.7 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
EPSS: 0.001030000 probability, percentile 0.277050000 (date 2026-05-05)
Problem Types: CWE-120 | CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.7 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| 3.1 | CNA | CVSSV3_1 | 7.7 | HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
ChangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.1 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.1.2 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.1.3 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.2 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.2.1 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.2.4 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.2.5 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.2.9 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.3 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.3.12 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.3.2 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.3.7 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.3.9 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.10 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.13 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.18 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.2 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.24 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.26 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.29 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.30 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.35 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.37 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.38 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.39 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.4 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.40 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.41 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.47 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.48 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.50 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.52 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.54 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.55 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.56 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.58 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.62 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.65 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.67 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.7 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.12.4.8 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.1 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.1.28 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.2 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.2.11 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.2.13 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.2.14 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.2.3 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.2.7 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.3 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.3.14 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.3.15 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.3.19 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.3.23 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.3.3 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.14 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.19 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.27 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.38 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.39 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.42 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.48 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.55 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.57 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.61 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.62 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.67 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.70 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.71 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.76 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.82 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.84 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.16.4.9 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.10 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.11 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.13 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.15 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.20 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.30 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.33 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.39 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.45 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.46 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.7 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.17.1.9 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.1 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.1.3 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.2 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.2.5 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.2.7 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.2.8 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.3 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.3.39 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.3.46 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.3.53 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.3.55 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.3.56 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.22 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.24 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.29 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.34 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.40 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.47 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.5 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.50 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.52 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.53 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.57 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.18.4.8 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.12 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.18 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.22 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.24 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.27 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.28 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.31 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.37 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.38 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.42 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.5 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.19.1.9 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.1 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.1.5 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.2 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.2.10 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.2.21 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.2.22 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.3 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.3.10 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.3.13 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.3.16 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.3.20 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.3.4 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.3.7 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.20.3.9 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.22.1.1 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.22.1.2 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.22.1.3 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.22.1.6 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.22.2 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.23.1 | All | All | All |
| Operating System | Cisco | Adaptive Security Appliance Software | 9.23.1.3 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.10 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.11 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.12 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.13 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.14 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.15 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.16 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.17 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.18 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.3 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.4 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.5 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.6 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.7 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.8 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 6.4.0.9 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.0 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.0.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.1.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.2.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.3 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.4 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.5 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.6 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.6.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.6.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.6.3 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.7 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.8 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.0.8.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.1.0 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.1.0.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.1.0.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.1.0.3 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.0 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.0.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.10 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.10.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.3 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.4 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.4.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.5 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.5.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.5.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.6 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.7 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.8 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.8.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.2.9 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.3.0 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.3.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.3.1.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.3.1.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.4.0 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.4.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.4.1.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.4.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.4.2.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.4.2.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.4.2.3 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.4.2.4 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.6.0 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.6.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.6.2 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.6.2.1 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.7.0 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.7.10 | All | All | All |
| Application | Cisco | Firepower Threat Defense | 7.7.10.1 | All | All | All |
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd... | [email protected] | sec.cloudapps.cisco.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
Exploits
CNA: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerabilities that are described in this advisory.
There are currently no legacy QID mappings associated with this CVE.