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5.0

Cisco Secure Access Control System allows password bypass

CVE-2012-5424 · published 14 years ago
Summary

The Cisco Secure Access Control System (ACS) can be tricked into accepting a fake password when it is set up to use both TACACS+ and LDAP services. This lets someone log in without knowing the real password. Update the ACS software to the latest patches or re‑configure the authentication settings to eliminate the risk.

What to do

The CVE record does not list a fixed version. Check the vendor's site or the advisory links below - a fix may already be released.

Affected software
VendorProductAffected versions
cisco secure_access_control_server 5.0
5.1
5.2
5.3
cpe:2.3:a:cisco:secure_access_control_server:5.0:*:*:*:*:*:*:*
Original advisory text
Cisco Secure Access Control System (ACS) 5.x before 5.2 Patch 11 and 5.3 before 5.3 Patch 7, when a certain configuration involving TACACS+ and LDAP is used, does not properly validate passwords, w...
Cisco Secure Access Control System (ACS) 5.x before 5.2 Patch 11 and 5.3 before 5.3 Patch 7, when a certain configuration involving TACACS+ and LDAP is used, does not properly validate passwords, which allows remote attackers to bypass authentication by sending a valid username and a crafted password string, aka Bug ID CSCuc65634.
References
Fix within
Internet-facing 14 days
Internal 60 days
  • Not known to be exploited
  • Can be exploited automatically (estimated)
  • Gives an attacker partial control (estimated)
Severity
5.0 Medium
Exploitation
2% chance of attack within 30 days
Type
CWE-20Improper Input Validation
Timeline
Published7 Nov 2012
Updated29 Oct 2026
First seen29 Sep 2026
Sources
CVE-2012-5424 · NVD
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