CVE-2013-5509

critical
Published 2013-10-13 · Modified 2026-04-29
CVSS v3
CVSS v2
10.0
VIR risk
10.0

Description

The SSL implementation in Cisco Adaptive Security Appliance (ASA) Software 9.0 before 9.0(2.6) and 9.1 before 9.1(2) allows remote attackers to bypass authentication, and obtain VPN access or administrative access, via a crafted X.509 client certificate, aka Bug ID CSCuf52468.

Predictions

Exploit likelihood
20%
Patch ETA

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: psirt@cisco.com — http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5509

vendor Authored 2026-05-27

Vendor advisory: psirt@cisco.com — http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131009-asa

References

CWEs

CWE-264

Verify integrity in audit chain (admin only). AS-IS.