# CVE-2026-20101 ## Summary - **CVE ID:** CVE-2026-20101 - **Severity:** HIGH - **CVSS Score:** 8.6 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H) - **CWE:** CWE-330 - **Published:** Mar 4, 2026 - **Last Modified:** Mar 12, 2026 ## Description 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 Products - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.1) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.1.2) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.1.3) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.2) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.2.4) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.2.5) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.2.9) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.3) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.3.2) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.3.7) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.3.12) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.3.9) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.2.1) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.2) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.4) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.7) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.10) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.13) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.8) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.18) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.24) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.26) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.29) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.30) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.35) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.37) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.38) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.39) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.40) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.41) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.47) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.48) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.50) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.52) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.54) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.55) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.56) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.58) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.62) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.65) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.12.4.67) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.1) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.1.28) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.2) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.2.3) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.2.7) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.2.11) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.2.13) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.2.14) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.3) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.3.3) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.3.14) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.3.15) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.3.19) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.3.23) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.9) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.14) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.19) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.27) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.38) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.39) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.42) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.48) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.55) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.57) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.61) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.62) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.67) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.70) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.71) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.76) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.82) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.16.4.84) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.7) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.9) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.10) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.11) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.13) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.15) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.20) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.30) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.33) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.39) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.45) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.17.1.46) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.1) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.1.3) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.2) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.2.5) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.2.7) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.2.8) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.3) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.3.39) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.3.46) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.3.53) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.3.55) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.3.56) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.5) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.8) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.22) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.24) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.29) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.34) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.40) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.47) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.50) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.52) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.53) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.18.4.57) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.5) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.9) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.12) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.18) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.22) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.24) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.27) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.28) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.31) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.37) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.38) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.19.1.42) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.1) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.1.5) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.2) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.2.10) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.2.21) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.2.22) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.3) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.3.4) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.3.7) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.3.9) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.3.10) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.3.13) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.3.16) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.20.3.20) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.22.1.1) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.22.1.3) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.22.1.2) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.22.1.6) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.22.2) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.23.1) - Cisco — Cisco Secure Firewall Adaptive Security Appliance (ASA) Software (9.23.1.3) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.3) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.4) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.5) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.6) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.7) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.8) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.9) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.10) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.11) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.12) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.13) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.14) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.15) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.16) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.17) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (6.4.0.18) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.0) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.0.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.1.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.2.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.3) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.4) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.5) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.6) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.6.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.6.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.6.3) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.7) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.8) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.0.8.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.1.0) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.1.0.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.1.0.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.1.0.3) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.0) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.0.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.3) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.4) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.4.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.5) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.5.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.6) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.7) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.5.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.8) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.8.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.9) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.10) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.2.10.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.3.0) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.3.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.3.1.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.3.1.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.0) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.1.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.2.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.2.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.2.3) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.4.2.4) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.6.0) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.6.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.6.2) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.6.2.1) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.7.0) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.7.10) - Cisco — Cisco Secure Firewall Threat Defense (FTD) Software (7.7.10.1) ## References - [CNA](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-m9sx6MbC) ## Exploitation Prediction (EPSS) - **EPSS Score:** 0.35% - **EPSS Percentile:** 28.6 --- _Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._