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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Cisco Cisco Secure Firewall Adaptive Security Appliance (ASA) Software affected
Version Status Constraints
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 affected —
Cisco Cisco Secure Firewall Threat Defense (FTD) Software affected
Version Status Constraints
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 affected —

No data.

No data.

No data.

Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-vpn-m9sx6MbC cve-icon cve-icon
History

Wed, 04 Mar 2026 17:30:00 +0000

Type Values Removed Values Added
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.
Weaknesses CWE-330
References
Metrics cvssV3_1

{'score': 8.6, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-03-04T17:19:22.576Z

Reserved: 2025-10-08T11:59:15.370Z

Link: CVE-2026-20101

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-04T18:16:25.137

Modified: 2026-03-04T18:16:25.137

Link: CVE-2026-20101

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses