CVE-2026-20101 — Use of Insufficiently Random Values in Cisco Secure Firewall Adaptive Security Appliance Software

CWE-330 — Use of Insufficiently Random ValuesCWE-120 — Classic Buffer OverflowCWE-401 — Missing Release of Memory after Effective LifetimeCWE-770 — Allocation of Resources Without Limits or Throttling4 documents4 sources
Severity
8.6HIGHNVD
EPSS
0.1%
top 64.40%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Cisco Secure Firewall Adaptive Security Appliance SoftwareCisco Secure Firewall Threat Defense Software
Timeline
PublishedMar 4
Latest updateMar 5

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…

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:HExploitability: 3.9 | Impact: 4.0

Affected Packages2 packages

🔴Vulnerability Details

2
GHSA
GHSA-4fg2-48mj-xwjm: A vulnerability in the SAML 2↗2026-03-04
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CVEList
CVE-2026-20101: A vulnerability in the SAML 2↗2026-03-04
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📋Vendor Advisories

1
Cisco
Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Denial of Service Vulnerabilities↗2026-03-05
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CVE-2026-20101 — Use of Insufficiently Random Values | cvebase