How severe is CVE-2011-3296?

CVE-2011-3296 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2011-3296 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2011-3296?

CVE-2011-3296 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-2011-3296?

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-2011-3296 published?

CVE-2011-3296 was published on 2011-10-06 and last updated on 2026-06-16.

CVE-2011-3296

CVE-2011-3296 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-399.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 2% (75th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-399
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 IPv6 is used, allows remote attackers to cause a denial of service (memory corruption and module crash or hang) via vectors that trigger syslog message 302015, aka Bug ID CSCti83875.

Frequently asked questions

What is CVE-2011-3296?: 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 IPv6 is used, allows remote attackers to cause a denial of service (memory corruption and module crash or hang) via vectors that trigger syslog message 302015, aka Bug ID CSCti83875.
How severe is CVE-2011-3296?: CVE-2011-3296 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2011-3296 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (75th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2011-3296?: CVE-2011-3296 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-2011-3296?: 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-2011-3296 published?: CVE-2011-3296 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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Other CWE-399 (Resource Management Errors) vulnerabilities

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