CVE-2012-5424 — 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

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MEDIUM

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

Published Nov 7, 2012

5.0

MEDIUM

CVSS 2.0

EPSS 2.45%

Description

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.

Affected products

Remediation

No remediation recorded yet.

Metrics

2.45% 0.02452

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.02452

Score over time

2022–2026

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Percentile over time

EPSS v2
EPSS v3
EPSS v4
EPSS v5

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	2.45% (0.02452)	83.82th	v5 (v2026.06.15)
Jun 15, 2026	2.45% (0.02452)	82.23th	v5 (v2026.06.15)
Mar 17, 2025	0.22% (0.00219)	42.56th	v4 (v2025.03.14)
Dec 12, 2024	0.47% (0.00472)	76.44th	v3 (v2023.03.01)
Feb 8, 2024	0.47% (0.00472)	74.90th	v3 (v2023.03.01)
Mar 7, 2023	0.47% (0.00472)	71.83th	v3 (v2023.03.01)
Mar 6, 2023	1.32% (0.01319)	71.27th	v2 (v2022.01.01)
Feb 23, 2023	1.32% (0.01319)	71.23th	v2 (v2022.01.01)
Apr 1, 2022	1.32% (0.01319)	69.22th	v2 (v2022.01.01)
Feb 4, 2022	1.32% (0.01319)	44.98th	v2 (v2022.01.01)

Weaknesses (1)

CWE-20

Improper Input Validation

References (6)

http://osvdb.org/87251
vdb-entryx_refsource_OSVDB
http://secunia.com/advisories/51194
third-party-advisoryx_refsource_SECUNIA
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20121107-acs
vendor-advisoryx_refsource_CISCOVendor Advisory
http://www.securityfocus.com/bid/56433
vdb-entryx_refsource_BID
http://www.securitytracker.com/id?1027733
vdb-entryx_refsource_SECTRACK
https://exchange.xforce.ibmcloud.com/vulnerabilities/79860
vdb-entryx_refsource_XF

Link	Providers	Tags
http://osvdb.org/87251		vdb-entryx_refsource_OSVDB
http://secunia.com/advisories/51194		third-party-advisoryx_refsource_SECUNIA
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20121107-acs		vendor-advisoryx_refsource_CISCOVendor Advisory
http://www.securityfocus.com/bid/56433		vdb-entryx_refsource_BID
http://www.securitytracker.com/id?1027733		vdb-entryx_refsource_SECTRACK
https://exchange.xforce.ibmcloud.com/vulnerabilities/79860		vdb-entryx_refsource_XF

Change history (0)

No recorded changes yet.

Sources

CVE.org / MITRE

Status PUBLISHED

Assigner cisco

Published Nov 7, 2012

Updated Aug 6, 2024

Reserved Oct 17, 2012

Link CVE-2012-5424

CISA Vulnrichment

Updated n/a

NVD

Status Modified

Modified Jun 16, 2026

Link CVE-2012-5424

Red Hat

Severity n/a

Public date n/a

Links CVE-2012-5424