Servers and applications
CVE-2013-5509
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.
- Severity
- High 10.0
- Published
- 13 Oct 2013
- Last changed
- 16 Jun 2026
- Added to UpHeron
- 1 Nov 2026
- Exploit chance
- 2.3% in the next 30 daysHigher than 83% of CVEs. EPSS by FIRST, 12 Nov 2026
- Weakness
- CWE-264
- Attack
- Over the network · No login needed
- Attacker can
- Read data · Change data · Take it down
- CVSS vector
AV:N/AC:L/Au:N/C:C/I:C/A:C- Sources
- NVD
Affected software
| Software | Affected versions |
|---|---|
Cisco ASA and Firepower Threat DefenseServers and applications · cpe:o:cisco:adaptive_security_appliance_software |
|