How severe is CVE-2011-3297?

CVE-2011-3297 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2011-3297 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3297?

CVE-2011-3297 primarily affects Cisco Firewall Services Module Software. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2011-3297?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2011-3297 published?

CVE-2011-3297 was published on 2011-10-06 and last updated on 2026-06-16.

CVE-2011-3297

CVE-2011-3297 is a high-severity vulnerability in Cisco Firewall Services Module Software with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 1% (69th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Cisco Firewall Services Module Software
Published: 2011-10-06
Last modified: 2026-06-16

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.

Frequently asked questions

What is 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.
How severe is CVE-2011-3297?: CVE-2011-3297 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2011-3297 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (69th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3297?: CVE-2011-3297 primarily affects Cisco Firewall Services Module Software. In total, 66 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2011-3297?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2011-3297 published?: CVE-2011-3297 was published on 2011-10-06 and last updated on 2026-06-16.

References

Affected products (66)

cpe:2.3:a:cisco:firewall_services_module_software:3.1:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(3\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(4\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(5\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(6\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(7\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(8\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(9\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(10\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(11\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(12\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(13\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(14\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(15\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(16\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(17\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(18\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(19\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.1\(20\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2:*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(1\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(2\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(3\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(4\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(5\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(6\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(7\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(8\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(9\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(10\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(11\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(12\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(13\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(14\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(15\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(16\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(17\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(18\):*:*:*:*:*:*:*
cpe:2.3:a:cisco:firewall_services_module_software:3.2\(19\):*:*:*:*:*:*:*

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