CVE-2026-20105
Cisco Adaptive Security Appliance (ASA) vulnerability analysis and mitigation

A 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 authenticated, remote attacker with a valid VPN connection to exhaust device memory 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. 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 to reload, resulting in a DoS condition.


SourceNVD

Related Cisco Adaptive Security Appliance (ASA) vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-20103HIGH8.6
  • Cisco Adaptive Security Appliance (ASA)Cisco Adaptive Security Appliance (ASA)
  • cpe:2.3:o:cisco:adaptive_security_appliance_software
NoYesMar 04, 2026
CVE-2026-20105HIGH7.7
  • Cisco Adaptive Security Appliance (ASA)Cisco Adaptive Security Appliance (ASA)
  • cpe:2.3:o:cisco:adaptive_security_appliance_software
NoYesMar 04, 2026
CVE-2026-20102MEDIUM6.1
  • Cisco Adaptive Security Appliance (ASA)Cisco Adaptive Security Appliance (ASA)
  • cpe:2.3:o:cisco:adaptive_security_appliance_software
NoYesMar 04, 2026
CVE-2026-20106MEDIUM5.3
  • Cisco Adaptive Security Appliance (ASA)Cisco Adaptive Security Appliance (ASA)
  • cpe:2.3:o:cisco:adaptive_security_appliance_software
NoYesMar 04, 2026
CVE-2026-20021MEDIUM4.3
  • Cisco Adaptive Security Appliance (ASA)Cisco Adaptive Security Appliance (ASA)
  • cpe:2.3:o:cisco:adaptive_security_appliance_software
NoYesMar 04, 2026

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