CVE-2011-3297

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.

Published: 2011-10-06 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-3297 is rated Moderate Risk (55.6/100): CVSS High severity, with medium exploitation likelihood (EPSS 1.39%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-3297

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 1.01% 1.39% +0.37%
2 2026-02-18 0.79% 1.01% +0.22%
3 2025-03-30 — 0.79% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-3297

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2011-3297

Affected software / configurations for CVE-2011-3297

Vendor Product Version Raw CPE
cisco firewall_services_module_software 3.1 cpe:2.3:a:cisco:firewall_services_module_software:3.1:*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(2\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(2\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(3\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(3\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(4\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(4\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(5\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(5\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(6\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(6\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(7\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(7\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(8\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(8\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(9\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(9\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(10\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(10\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(11\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(11\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(12\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(12\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(13\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(13\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(14\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(14\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(15\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(15\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(16\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(16\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(17\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(17\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(18\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(18\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(19\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(19\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.1\(20\) cpe:2.3:a:cisco:firewall_services_module_software:3.1\(20\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2 cpe:2.3:a:cisco:firewall_services_module_software:3.2:*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(1\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(1\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(2\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(2\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(3\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(3\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(4\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(4\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(5\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(5\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(6\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(6\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(7\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(7\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(8\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(8\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(9\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(9\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(10\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(10\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(11\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(11\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(12\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(12\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(13\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(13\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(14\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(14\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(15\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(15\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(16\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(16\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(17\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(17\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(18\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(18\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(19\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(19\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(20\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(20\):*:*:*:*:*:*:*
cisco firewall_services_module_software 3.2\(21\) cpe:2.3:a:cisco:firewall_services_module_software:3.2\(21\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0 cpe:2.3:a:cisco:firewall_services_module_software:4.0:*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(1\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(1\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(2\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(2\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(3\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(3\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(4\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(4\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(5\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(5\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(6\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(6\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(7\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(7\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(8\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(8\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(10\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(10\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(11\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(11\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(12\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(12\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(13\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(13\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(14\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(14\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.0\(15\) cpe:2.3:a:cisco:firewall_services_module_software:4.0\(15\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.1 cpe:2.3:a:cisco:firewall_services_module_software:4.1:*:*:*:*:*:*:*
cisco firewall_services_module_software 4.1\(1\) cpe:2.3:a:cisco:firewall_services_module_software:4.1\(1\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.1\(2\) cpe:2.3:a:cisco:firewall_services_module_software:4.1\(2\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.1\(3\) cpe:2.3:a:cisco:firewall_services_module_software:4.1\(3\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.1\(4\) cpe:2.3:a:cisco:firewall_services_module_software:4.1\(4\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.1\(5\) cpe:2.3:a:cisco:firewall_services_module_software:4.1\(5\):*:*:*:*:*:*:*
cisco firewall_services_module_software 4.1\(6\) cpe:2.3:a:cisco:firewall_services_module_software:4.1\(6\):*:*:*:*:*:*:*
cisco catalyst_6500 — cpe:2.3:h:cisco:catalyst_6500:*:*:*:*:*:*:*:*
cisco catalyst_7600 — cpe:2.3:h:cisco:catalyst_7600:*:*:*:*:*:*:*:*

References for CVE-2011-3297

cvelogic Threat Intelligence