Unrated severityNVD Advisory· Published Oct 13, 2013· Updated Jun 16, 2026

CVE-2013-5509

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cisco Systems, Inc./Cisco Adaptive Security Appliance2 versions
cpe:2.3:o:cisco:adaptive_security_appliance_software:9.0:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:adaptive_security_appliance_software:9.0:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:adaptive_security_appliance_software:9.1:*:*:*:*:*:*:*
Cisco Systems, Inc./Adaptive Security Appliance (ASA) Softwarellm-fuzzy
Range: <9.0(2.6), <9.1(2)

Patches

Vulnerability mechanics

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20131009-asanvdVendor Advisory
tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2013-5509nvdVendor Advisory

News mentions

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