High severity7.5NVD Advisory· Published Oct 22, 2011· Updated Apr 29, 2026

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.

Affected products

Cisco Systems, Inc./Cisco iOS
cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
Range: >=12.2,<12.2\(33\)sxj1

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.cisco.com/en/US/docs/switches/lan/catalyst6500/ios/12.2SX/release/notes/caveats_SXJ.htmlnvdRelease NotesVendor Advisory

News mentions

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