CVE-2026-20020
Summary
| CVE | CVE-2026-20020 |
|---|---|
| State | PUBLISHED |
| Assigner | cisco |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-03-04 19:16:11 UTC |
| Updated | 2026-05-04 15:07:05 UTC |
| Description | A vulnerability in the OSPF protocol of Cisco Secure Firewall ASA Software and Cisco Secure FTD Software could allow an unauthenticated, adjacent attacker to cause an affected device to reload unexpectedly, resulting in a DoS condition. If OSPF authentication is enabled, the attacker must know the secret key to exploit this vulnerability. This vulnerability is due to insufficient input validation when processing OSPF update packets. An attacker could exploit this vulnerability by sending crafted OSPF update packets. A successful exploit could allow the attacker to create a buffer overflow, causing the affected device to reload, resulting in a DoS condition. |
Risk And Classification
Primary CVSS: v3.1 5.7 MEDIUM from [email protected]
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.000120000 probability, percentile 0.017780000 (date 2026-05-05)
Problem Types: CWE-20 | NVD-CWE-noinfo | CWE-20 Improper Input Validation
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 5.7 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | [email protected] | Secondary | 6.8 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
| 3.1 | CNA | CVSSV3_1 | 6.8 | MEDIUM | CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
AdjacentAttack Complexity
LowPrivileges Required
LowUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/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 | 9.16.4.85 | 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 |
| 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 |
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.