CVE-2026-20101 — Cisco / Cisco Secure Firewall Adaptive Security Appliance (ASA) Software

Description (CNA)

A vulnerability in the SAML 2.0 single sign-on (SSO) feature of Cisco Secure Firewall ASA Software and Secure FTD Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a DoS condition. This vulnerability is due to insufficient error checking when processing SAML messages. An attacker could exploit this vulnerability by sending crafted SAML messages to the SAML service. A successful exploit could allow the attacker to cause the device to reload, resulting in a DoS condition.

Affected (CNA)

Vendor / product	Versions
Cisco / Cisco Secure Firewall Adaptive Security Appliance (ASA) Software	affected 9.12.1; affected 9.12.1.2; affected 9.12.1.3; affected 9.12.2; affected 9.12.2.4; affected 9.12.2.5; affected 9.12.2.9; affected 9.12.3; affected 9.12.3.2; affected 9.12.3.7; affected 9.12.4; affected 9.12.3.12; affected 9.12.3.9; affected 9.12.2.1; affected 9.12.4.2; affected 9.12.4.4; affected 9.12.4.7; affected 9.12.4.10; affected 9.12.4.13; affected 9.12.4.8; affected 9.12.4.18; affected 9.12.4.24; affected 9.12.4.26; affected 9.12.4.29; affected 9.12.4.30; affected 9.12.4.35; affected 9.12.4.37; affected 9.12.4.38; affected 9.12.4.39; affected 9.12.4.40; affected 9.12.4.41; affected 9.12.4.47; affected 9.12.4.48; affected 9.12.4.50; affected 9.12.4.52; affected 9.12.4.54; affected 9.12.4.55; affected 9.12.4.56; affected 9.12.4.58; affected 9.12.4.62; affected 9.12.4.65; affected 9.12.4.67; affected 9.16.1; affected 9.16.1.28; affected 9.16.2; affected 9.16.2.3; affected 9.16.2.7; affected 9.16.2.11; affected 9.16.2.13; affected 9.16.2.14; affected 9.16.3; affected 9.16.3.3; affected 9.16.3.14; affected 9.16.3.15; affected 9.16.3.19; affected 9.16.3.23; affected 9.16.4; affected 9.16.4.9; affected 9.16.4.14; affected 9.16.4.19; affected 9.16.4.27; affected 9.16.4.38; affected 9.16.4.39; affected 9.16.4.42; affected 9.16.4.48; affected 9.16.4.55; affected 9.16.4.57; affected 9.16.4.61; affected 9.16.4.62; affected 9.16.4.67; affected 9.16.4.70; affected 9.16.4.71; affected 9.16.4.76; affected 9.16.4.82; affected 9.16.4.84; affected 9.17.1; affected 9.17.1.7; affected 9.17.1.9; affected 9.17.1.10; affected 9.17.1.11; affected 9.17.1.13; affected 9.17.1.15; affected 9.17.1.20; affected 9.17.1.30; affected 9.17.1.33; affected 9.17.1.39; affected 9.17.1.45; affected 9.17.1.46; affected 9.18.1; affected 9.18.1.3; affected 9.18.2; affected 9.18.2.5; affected 9.18.2.7; affected 9.18.2.8; affected 9.18.3; affected 9.18.3.39; affected 9.18.3.46; affected 9.18.3.53; affected 9.18.3.55; affected 9.18.3.56; affected 9.18.4; affected 9.18.4.5; affected 9.18.4.8; affected 9.18.4.22; affected 9.18.4.24; affected 9.18.4.29; affected 9.18.4.34; affected 9.18.4.40; affected 9.18.4.47; affected 9.18.4.50; affected 9.18.4.52; affected 9.18.4.53; affected 9.18.4.57; affected 9.19.1; affected 9.19.1.5; affected 9.19.1.9; affected 9.19.1.12; affected 9.19.1.18; affected 9.19.1.22; affected 9.19.1.24; affected 9.19.1.27; affected 9.19.1.28; affected 9.19.1.31; affected 9.19.1.37; affected 9.19.1.38; affected 9.19.1.42; affected 9.20.1; affected 9.20.1.5; affected 9.20.2; affected 9.20.2.10; affected 9.20.2.21; affected 9.20.2.22; affected 9.20.3; affected 9.20.3.4; affected 9.20.3.7; affected 9.20.3.9; affected 9.20.3.10; affected 9.20.3.13; affected 9.20.3.16; affected 9.20.3.20; affected 9.22.1.1; affected 9.22.1.3; affected 9.22.1.2; affected 9.22.1.6; affected 9.22.2; affected 9.23.1; affected 9.23.1.3
Cisco / Cisco Secure Firewall Threat Defense (FTD) Software	affected 6.4.0; affected 6.4.0.1; affected 6.4.0.3; affected 6.4.0.2; affected 6.4.0.4; affected 6.4.0.5; affected 6.4.0.6; affected 6.4.0.7; affected 6.4.0.8; affected 6.4.0.9; affected 6.4.0.10; affected 6.4.0.11; affected 6.4.0.12; affected 6.4.0.13; affected 6.4.0.14; affected 6.4.0.15; affected 6.4.0.16; affected 6.4.0.17; affected 6.4.0.18; affected 7.0.0; affected 7.0.0.1; affected 7.0.1; affected 7.0.1.1; affected 7.0.2; affected 7.0.2.1; affected 7.0.3; affected 7.0.4; affected 7.0.5; affected 7.0.6; affected 7.0.6.1; affected 7.0.6.2; affected 7.0.6.3; affected 7.0.7; affected 7.0.8; affected 7.0.8.1; affected 7.1.0; affected 7.1.0.1; affected 7.1.0.2; affected 7.1.0.3; affected 7.2.0; affected 7.2.0.1; affected 7.2.1; affected 7.2.2; affected 7.2.3; affected 7.2.4; affected 7.2.4.1; affected 7.2.5; affected 7.2.5.1; affected 7.2.6; affected 7.2.7; affected 7.2.5.2; affected 7.2.8; affected 7.2.8.1; affected 7.2.9; affected 7.2.10; affected 7.2.10.2; affected 7.3.0; affected 7.3.1; affected 7.3.1.1; affected 7.3.1.2; affected 7.4.0; affected 7.4.1; affected 7.4.1.1; affected 7.4.2; affected 7.4.2.1; affected 7.4.2.2; affected 7.4.2.3; affected 7.4.2.4; affected 7.6.0; affected 7.6.1; affected 7.6.2; affected 7.6.2.1; affected 7.7.0; affected 7.7.10; affected 7.7.10.1

Vendor / product

Versions

Cisco / Cisco Secure Firewall Adaptive Security Appliance (ASA) Software

affected 9.12.1; affected 9.12.1.2; affected 9.12.1.3; affected 9.12.2; affected 9.12.2.4; affected 9.12.2.5; affected 9.12.2.9; affected 9.12.3; affected 9.12.3.2; affected 9.12.3.7; affected 9.12.4; affected 9.12.3.12; affected 9.12.3.9; affected 9.12.2.1; affected 9.12.4.2; affected 9.12.4.4; affected 9.12.4.7; affected 9.12.4.10; affected 9.12.4.13; affected 9.12.4.8; affected 9.12.4.18; affected 9.12.4.24; affected 9.12.4.26; affected 9.12.4.29; affected 9.12.4.30; affected 9.12.4.35; affected 9.12.4.37; affected 9.12.4.38; affected 9.12.4.39; affected 9.12.4.40; affected 9.12.4.41; affected 9.12.4.47; affected 9.12.4.48; affected 9.12.4.50; affected 9.12.4.52; affected 9.12.4.54; affected 9.12.4.55; affected 9.12.4.56; affected 9.12.4.58; affected 9.12.4.62; affected 9.12.4.65; affected 9.12.4.67; affected 9.16.1; affected 9.16.1.28; affected 9.16.2; affected 9.16.2.3; affected 9.16.2.7; affected 9.16.2.11; affected 9.16.2.13; affected 9.16.2.14; affected 9.16.3; affected 9.16.3.3; affected 9.16.3.14; affected 9.16.3.15; affected 9.16.3.19; affected 9.16.3.23; affected 9.16.4; affected 9.16.4.9; affected 9.16.4.14; affected 9.16.4.19; affected 9.16.4.27; affected 9.16.4.38; affected 9.16.4.39; affected 9.16.4.42; affected 9.16.4.48; affected 9.16.4.55; affected 9.16.4.57; affected 9.16.4.61; affected 9.16.4.62; affected 9.16.4.67; affected 9.16.4.70; affected 9.16.4.71; affected 9.16.4.76; affected 9.16.4.82; affected 9.16.4.84; affected 9.17.1; affected 9.17.1.7; affected 9.17.1.9; affected 9.17.1.10; affected 9.17.1.11; affected 9.17.1.13; affected 9.17.1.15; affected 9.17.1.20; affected 9.17.1.30; affected 9.17.1.33; affected 9.17.1.39; affected 9.17.1.45; affected 9.17.1.46; affected 9.18.1; affected 9.18.1.3; affected 9.18.2; affected 9.18.2.5; affected 9.18.2.7; affected 9.18.2.8; affected 9.18.3; affected 9.18.3.39; affected 9.18.3.46; affected 9.18.3.53; affected 9.18.3.55; affected 9.18.3.56; affected 9.18.4; affected 9.18.4.5; affected 9.18.4.8; affected 9.18.4.22; affected 9.18.4.24; affected 9.18.4.29; affected 9.18.4.34; affected 9.18.4.40; affected 9.18.4.47; affected 9.18.4.50; affected 9.18.4.52; affected 9.18.4.53; affected 9.18.4.57; affected 9.19.1; affected 9.19.1.5; affected 9.19.1.9; affected 9.19.1.12; affected 9.19.1.18; affected 9.19.1.22; affected 9.19.1.24; affected 9.19.1.27; affected 9.19.1.28; affected 9.19.1.31; affected 9.19.1.37; affected 9.19.1.38; affected 9.19.1.42; affected 9.20.1; affected 9.20.1.5; affected 9.20.2; affected 9.20.2.10; affected 9.20.2.21; affected 9.20.2.22; affected 9.20.3; affected 9.20.3.4; affected 9.20.3.7; affected 9.20.3.9; affected 9.20.3.10; affected 9.20.3.13; affected 9.20.3.16; affected 9.20.3.20; affected 9.22.1.1; affected 9.22.1.3; affected 9.22.1.2; affected 9.22.1.6; affected 9.22.2; affected 9.23.1; affected 9.23.1.3

Cisco / Cisco Secure Firewall Threat Defense (FTD) Software

affected 6.4.0; affected 6.4.0.1; affected 6.4.0.3; affected 6.4.0.2; affected 6.4.0.4; affected 6.4.0.5; affected 6.4.0.6; affected 6.4.0.7; affected 6.4.0.8; affected 6.4.0.9; affected 6.4.0.10; affected 6.4.0.11; affected 6.4.0.12; affected 6.4.0.13; affected 6.4.0.14; affected 6.4.0.15; affected 6.4.0.16; affected 6.4.0.17; affected 6.4.0.18; affected 7.0.0; affected 7.0.0.1; affected 7.0.1; affected 7.0.1.1; affected 7.0.2; affected 7.0.2.1; affected 7.0.3; affected 7.0.4; affected 7.0.5; affected 7.0.6; affected 7.0.6.1; affected 7.0.6.2; affected 7.0.6.3; affected 7.0.7; affected 7.0.8; affected 7.0.8.1; affected 7.1.0; affected 7.1.0.1; affected 7.1.0.2; affected 7.1.0.3; affected 7.2.0; affected 7.2.0.1; affected 7.2.1; affected 7.2.2; affected 7.2.3; affected 7.2.4; affected 7.2.4.1; affected 7.2.5; affected 7.2.5.1; affected 7.2.6; affected 7.2.7; affected 7.2.5.2; affected 7.2.8; affected 7.2.8.1; affected 7.2.9; affected 7.2.10; affected 7.2.10.2; affected 7.3.0; affected 7.3.1; affected 7.3.1.1; affected 7.3.1.2; affected 7.4.0; affected 7.4.1; affected 7.4.1.1; affected 7.4.2; affected 7.4.2.1; affected 7.4.2.2; affected 7.4.2.3; affected 7.4.2.4; affected 7.6.0; affected 7.6.1; affected 7.6.2; affected 7.6.2.1; affected 7.7.0; affected 7.7.10; affected 7.7.10.1

CWE

CWE-330

References

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-m9sx6MbC

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.