CVE-2011-1640

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2022-05-13. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 2%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
75.4%
KEV
Not listed

Published

October 22, 2011

Last Modified

April 29, 2026

References (2)

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 44× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:23 UTCEPSS rescore
  2. 2026-07-06 02:19 UTCEPSS rescore
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  1. 2026-06-19 19:22 UTCEPSS rescore
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  12. 2026-06-13 22:57 UTCEPSS rescore
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  37. 2026-05-29 13:41 UTCEPSS rescore
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  39. 2026-05-29 06:28 UTCEG score recompute
  40. 2026-05-29 06:28 UTCGHSA enrichment
  41. 2026-05-28 13:42 UTCEPSS rescore
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  44. 2026-05-27 13:38 UTCEPSS rescore
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  46. 2026-05-26 13:41 UTCEPSS rescore
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  48. 2026-05-26 07:16 UTCEPSS rescore
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  50. 2026-05-24 16:43 UTCEPSS rescore
  51. 2026-05-22 21:15 UTCEPSS rescore
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  59. 2026-05-20 11:21 UTCEPSS rescore
  60. 2026-05-18 21:29 UTCEPSS rescore
  61. 2026-05-18 21:29 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2011-1640?
CVE-2011-1640 is a high vulnerability published on October 22, 2011. 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.
When was CVE-2011-1640 disclosed?
CVE-2011-1640 was first published in the National Vulnerability Database on October 22, 2011, with the most recent update on April 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2011-1640 actively exploited?
CVE-2011-1640 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 75.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2011-1640?
CVE-2011-1640 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2011-1640?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2011-1640, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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