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CVE-2012-5424

20
FAUCET Score

CVE-2012-5424 describes an authentication bypass vulnerability in Cisco Secure Access Control System (ACS) 5.x before 5.2 Patch 11 and 5.3 before 5.3 Patch 7. Specifically, when configured with TACACS+ and LDAP, the system fails to properly validate passwords, allowing remote attackers to bypass authentication with a valid username and a crafted password. The vulnerability has a CVSS score of 5.0 (Medium), indicating a low attack complexity and no authentication required, with a potential impact of partial confidentiality compromise. There is no impact on integrity or availability. There is no evidence of active exploitation, and no public exploit code (Metasploit, Nuclei, ExploitDB) is available. The vulnerability has received minimal community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
5.0CPE matchmatch criteria
cpe:2.3:a:cisco:secure_access_control_server:5.0:*:*:*:*:*:*:*
5.1CPE matchmatch criteria
cpe:2.3:a:cisco:secure_access_control_server:5.1:*:*:*:*:*:*:*
5.2CPE matchmatch criteria
cpe:2.3:a:cisco:secure_access_control_server:5.2:*:*:*:*:*:*:*
5.3CPE matchmatch criteria
cpe:2.3:a:cisco:secure_access_control_server:5.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

AV:N/AC:L/Au:N/C:P/I:N/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.45%
Probability of exploitation in next 30 days
EPSS Percentile
82.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0245 is in the 74th percentile among its peer group of 23,705 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (1)

ciscovendor investigatingvia nvd_reference
View patch

References

osvdb.org / 87251
secunia.com / advisories/51194
exchange.xforce.ibmcloud.com / vulnerabilities/79860
tools.cisco.com / security/center/content/CiscoSecurityAdvisory/cisco-sa-20121107-acs
Vendor Advisory
securityfocus.com / bid/56433
securitytracker.com / id