CVE WatchAug 11, 2026

CVE-2023-20264

A vulnerability in the implementation of Security Assertion Markup Language (SAML) 2.0 single sign-on (SSO) for remote access VPN in Cisco A

CVSS

6.1

Medium

EPSS

0.4%

p32

KEV

—

Exploit Today

0-100

Published: Nov 1, 2023 · Last modified: Aug 11, 2026 · CWE-601

EPSS · 30d

0.4%EPSS · 30 days0.4%

2026-08-232026-09-20

Technical description

A vulnerability in the implementation of Security Assertion Markup Language (SAML) 2.0 single sign-on (SSO) for remote access VPN in Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to intercept the SAML assertion of a user who is authenticating to a remote access VPN session. This vulnerability is due to insufficient validation of the login URL. An attacker could exploit this vulnerability by persuading a user to access a site that is under the control of the attacker, allowing the attacker to modify the login URL. A successful exploit could allow the attacker to intercept a successful SAML assertion and use that assertion to establish a remote access VPN session toward the affected device with the identity and permissions of the hijacked user, resulting in access to the protected network.

Official references

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