CVE-2011-3297

Severity: high (CVSS 7.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-10-06 · updated 2026-06-16
Weakness: CWE-287

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.

Affected products

Cisco Catalyst 6500: all versions
Cisco Catalyst 7600: all versions
Cisco Firewall Services Module Software: 3.1, 3.1(2), 3.1(3), 3.1(4), 3.1(5), 3.1(6) (+58)

References

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

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