CVE-2026-20103

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2026-20103
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-03-04 18:16:25 UTC
Updated2026-04-16 20:28:00 UTC
DescriptionA vulnerability in the Remote Access SSL VPN functionality of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to exhaust device memory resulting in a denial of service (DoS) condition to new Remote Access SSL VPN connections. This does not affect the management interface, though it may become temporarily unresponsive. This vulnerability is due to trusting user input without validation. An attacker could exploit this vulnerability by sending crafted packets to the Remote Access SSL VPN server. A successful exploit could allow the attacker to cause the device web interface to stop responding, resulting in a DoS condition.

Risk And Classification

Primary CVSS: v3.1 8.6 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Problem Types: CWE-770 | CWE-770 Allocation of Resources Without Limits or Throttling

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary8.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
3.1CNACVSSV3_18.6HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Cisco Adaptive Security Appliance Software All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.12.4.48 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.12.4.50 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.12.4.52 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.12.4.54 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.12.4.55 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.12.4.56 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.12.4.58 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.12.4.62 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.12.4.65 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.12.4.67 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.3.15 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.3.19 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.3.23 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.9 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.14 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.19 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.27 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.38 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.39 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.42 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.48 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.55 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.57 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.61 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.62 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.67 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.70 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.71 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.76 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.82 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.16.4.84 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.17.1.20 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.17.1.30 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.17.1.33 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.17.1.39 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.17.1.45 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.17.1.46 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.1.3 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.2 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.2.5 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.2.7 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.2.8 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.3 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.3.39 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.3.46 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.3.53 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.3.55 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.3.56 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.5 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.8 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.22 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.24 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.29 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.34 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.40 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.47 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.50 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.52 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.53 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.18.4.57 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.5 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.9 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.12 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.18 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.22 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.24 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.27 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.28 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.31 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.37 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.38 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.19.1.42 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.1 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.1.5 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.2 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.2.10 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.2.21 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.2.22 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.3 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.3.4 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.3.7 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.3.9 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.3.10 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.3.13 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.3.16 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.20.3.20 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.22.1.1 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.22.1.3 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.22.1.2 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.22.1.6 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.22.2 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.22.2.4 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.23.1 Not specified
CNA Cisco Cisco Secure Firewall Adaptive Security Appliance ASA Software affected 9.23.1.3 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 6.4.0.16 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 6.4.0.17 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 6.4.0.18 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.0.4 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.0.5 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.0.6 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.0.6.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.0.6.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.0.6.3 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.0.7 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.0.8 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.0.8.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.1.0.3 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.3 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.4 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.4.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.5 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.5.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.6 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.7 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.5.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.8 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.8.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.9 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.10 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.2.10.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.3.0 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.3.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.3.1.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.3.1.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.0 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.1.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.2.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.2.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.2.3 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.4.2.4 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.6.0 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.6.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.6.2 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.6.2.1 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.7.0 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.7.10 Not specified
CNA Cisco Cisco Secure Firewall Threat Defense FTD Software affected 7.7.10.1 Not specified

References

ReferenceSourceLinkTags
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

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.

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