High severity7.5NVD Advisory· Published Oct 22, 2011· Updated Jun 16, 2026
CVE-2011-1640
CVE-2011-1640
Description
The ethernet-lldp component in Cisco IOS 12.2 before 12.2(33)SXJ1 does not properly support a large number of LLDP Management Address (MA) TLVs, which allows remote attackers to cause a denial of service (device crash) via crafted LLDPDUs, aka Bug ID CSCtj22354.
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Affected products
2cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*range: >=12.2,<12.2\(33\)sxj1
- (no CPE)range: <12.2(33)SXJ1
Patches
Vulnerability mechanics
References
1- www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/release/notes/caveats_SXJ.htmlnvdRelease NotesVendor Advisory
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