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Vulnerability record · CVE-2011-3298 · published 6 October 2011

CVE-2011-3298: Cisco adaptive security appliance software improper authentication vulnerability

Cisco · Adaptive Security Appliance Software

Cisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services module in Cisco Catalyst 6500 series devices, with software 7.0 before 7.0(8.13), 7.1 and 7.2 before 7.2(5.3), 8.0 before 8.0(5.24), 8.1 before 8.1(2.50), 8.2 before 8.2(5), 8.3 before 8.3(2.18), 8.4 before 8.4(1.10), and 8.5 before 8.5(1.1) and Cisco Firewall Services Module (aka FWSM) 3.1 before 3.1(21), 3.2 before 3.2(22), 4.0 before 4.0(16), and 4.1 before 4.1(7) allow remote attackers to bypass authentication via a crafted TACACS+ reply, aka Bug IDs CSCto40365 and CSCto74274.

7.9 CVSS 2.0 High EPSS 0.86% · top 43.2% CWE-287 · Improper authentication
7.9CVSS 2.0 base score
0.86%EPSS exploitation probability, 30 days
NoNot in CISA KEV
6Affected product versions listed by NVD
6References
16 Jun 2026Last modified by NVD

Description

Cisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services module in Cisco Catalyst 6500 series devices, with software 7.0 before 7.0(8.13), 7.1 and 7.2 before 7.2(5.3), 8.0 before 8.0(5.24), 8.1 before 8.1(2.50), 8.2 before 8.2(5), 8.3 before 8.3(2.18), 8.4 before 8.4(1.10), and 8.5 before 8.5(1.1) and Cisco Firewall Services Module (aka FWSM) 3.1 before 3.1(21), 3.2 before 3.2(22), 4.0 before 4.0(16), and 4.1 before 4.1(7) allow remote attackers to bypass authentication via a crafted TACACS+ reply, aka Bug IDs CSCto40365 and CSCto74274.

AV:A/AC:M/Au:N/C:C/I:C/A:C

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.cisco.com/warp/public/707/cisco-sa-20111005-asa.shtml Vendor Advisory
http://www.cisco.com/warp/public/707/cisco-sa-20111005-fwsm.shtml Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/70328
http://www.cisco.com/warp/public/707/cisco-sa-20111005-asa.shtml Vendor Advisory
http://www.cisco.com/warp/public/707/cisco-sa-20111005-fwsm.shtml Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/70328

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Source: NIST National Vulnerability Database (record CVE-2011-3298), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.