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Vulnerability record · CVE-2011-3297 · published 6 October 2011

CVE-2011-3297: Cisco firewall services module software improper authentication vulnerability

Cisco · Firewall Services Module Software

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), when certain authentication configurations are used, allows remote attackers to cause a denial of service (module crash) by making many authentication requests for network access, aka Bug ID CSCtn15697.

7.8 CVSS 2.0 High EPSS 1.4% · top 28.8% CWE-287 · Improper authentication
7.8CVSS 2.0 base score
1.4%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
4References
16 Jun 2026Last modified by NVD

Description

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), when certain authentication configurations are used, allows remote attackers to cause a denial of service (module crash) by making many authentication requests for network access, aka Bug ID CSCtn15697.

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

Affected products

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

References

LinkTags
http://www.cisco.com/warp/public/707/cisco-sa-20111005-fwsm.shtml Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/70327
http://www.cisco.com/warp/public/707/cisco-sa-20111005-fwsm.shtml Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/70327

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.0CVE-2012-4661Cisco adaptive security appliance software memory buffer overflow vulnerabilityStack-based buffer overflow in the DCERPC inspection engine on Cisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services Mod…EPSS 4.0%7.9CVE-2011-3298Cisco adaptive security appliance software improper authentication vulnerabilityCisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services module in Cisco Catalyst 6500 series devices, with software 7.0 be…EPSS 0.86%7.8CVE-2013-1149Cisco adaptive security appliance software vulnerabilityCisco Adaptive Security Appliances (ASA) devices with software 7.x before 7.2(5.10), 8.0 before 8.0(5.28), 8.1 and 8.2 before 8.2(5.35), 8.3 before 8…EPSS 1.3%7.8CVE-2013-1155Cisco firewall services module software improper authentication vulnerabilityThe auth-proxy functionality in Cisco Firewall Services Module (FWSM) software 3.1 and 3.2 before 3.2(20.1), 4.0 before 4.0(15.2), and 4.1 before 4.1…EPSS 1.3%7.8CVE-2012-4660Cisco adaptive security appliance software memory buffer overflow vulnerabilityThe SIP inspection engine on Cisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services Module (ASASM) in Cisco Catalyst 6500…EPSS 1.8%7.8CVE-2012-3058Cisco adaptive security appliance software vulnerabilityCisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services Module (ASASM) in Cisco Catalyst 6500 series devices, with softwar…EPSS 2.0%7.8CVE-2012-0355Cisco adaptive security appliance software improper input validation vulnerabilityCisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services Module (ASASM) in Cisco Catalyst 6500 series devices, with softwar…EPSS 2.7%7.8CVE-2012-0356Cisco firewall services module software improper input validation vulnerabilityCisco Adaptive Security Appliances (ASA) 5500 series devices, and the ASA Services Module (ASASM) in Cisco Catalyst 6500 series devices, with softwar…EPSS 2.1%

Source: NIST National Vulnerability Database (record CVE-2011-3297), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.