CVE-2013-5509

Severity: critical (CVSS 10.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2013-10-13 · updated 2026-06-16
Weakness: CWE-264

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.

Affected products

Cisco ASA Software: 9.0, 9.1

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131009-asa
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5509
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131009-asa
http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5509

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