CVE-2024-20434

MEDIUMNVD 4.34.3—
EchelonGraph scoreMEDIUM confidence

Score 4.3 from GitHub Security Advisory published 2024-09-25. NVD baseline CVSS 4.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
4.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 4.3Exploit: None knownExposed: 0

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

A vulnerability in Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on the control plane of an affected device. This vulnerability is due to improper handling of frames with VLAN tag information. An attacker could exploit this vulnerability by sending crafted frames to an affected device. A successful exploit could allow the attacker to render the control plane of the affected device unresponsive. The device would not be accessible through the console or CLI, and it would not respond to ping requests, SNMP requests, or requests from other control plane protocols. Traffic that is traversing the device through the data plane is not affected. A reload of the device is required to restore control plane services.

CVSS v3
4.3
EG Score
4.3(medium)
EG Risk
19(Track)
EG Risk 19/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity43% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
17%
KEV
Not listed

Published

September 25, 2024

Last Modified

October 8, 2024

References (1)

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 43× 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.

Showing the most recent 100 of 111 total refreshes for this CVE.

  1. 2026-07-27 14:11 UTCEPSS rescore
  2. 2026-07-26 14:53 UTCEPSS rescore
  3. 2026-07-25 14:16 UTCEPSS rescore
  4. 2026-07-24 14:16 UTCEPSS rescore
  5. 2026-07-23 14:17 UTCEPSS rescore
  6. 2026-07-23 14:17 UTCEPSS rescore
  7. 2026-07-23 02:33 UTCEG score recompute
  8. 2026-07-22 23:19 UTCEG score recompute
  9. 2026-07-22 14:07 UTCEPSS rescore
  10. 2026-07-21 15:23 UTCEPSS rescore
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  12. 2026-07-20 17:06 UTCEPSS rescore
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  24. 2026-07-13 06:11 UTCEPSS rescore
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  1. 2026-07-12 05:45 UTCEPSS rescore
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  3. 2026-07-09 19:09 UTCEPSS rescore
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  5. 2026-07-08 15:13 UTCEPSS rescore
  6. 2026-07-07 13:45 UTCEPSS rescore
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  8. 2026-07-06 16:26 UTCEPSS rescore
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  21. 2026-06-27 03:07 UTCEPSS rescore
  22. 2026-06-27 03:07 UTCEPSS rescore
  23. 2026-06-25 13:48 UTCEPSS rescore
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  25. 2026-06-24 14:04 UTCEPSS rescore
  26. 2026-06-24 14:04 UTCEPSS rescore
  27. 2026-06-23 21:32 UTCEPSS rescore
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  29. 2026-06-22 14:24 UTCEPSS rescore
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  31. 2026-06-21 14:55 UTCEPSS rescore
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  35. 2026-06-19 19:24 UTCEPSS rescore
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  37. 2026-06-18 17:51 UTCEPSS rescore
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  41. 2026-06-16 17:51 UTCEPSS rescore
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  43. 2026-06-15 17:47 UTCEPSS rescore
  44. 2026-06-14 23:16 UTCEPSS rescore
  45. 2026-06-13 22:59 UTCEPSS rescore
  46. 2026-06-13 22:59 UTCEPSS rescore
  47. 2026-06-12 23:11 UTCEPSS rescore
  48. 2026-06-11 13:59 UTCEPSS rescore
  49. 2026-06-11 13:59 UTCEPSS rescore
  50. 2026-06-10 22:17 UTCEPSS rescore
  51. 2026-06-10 22:17 UTCEPSS rescore
  52. 2026-06-10 13:21 UTCEPSS rescore
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  54. 2026-06-08 14:16 UTCEPSS rescore
  55. 2026-06-08 14:16 UTCEPSS rescore
  56. 2026-06-07 15:24 UTCEPSS rescore
  57. 2026-06-07 15:24 UTCEPSS rescore
  58. 2026-06-06 13:46 UTCEPSS rescore
  59. 2026-06-06 13:46 UTCEPSS rescore
  60. 2026-06-05 22:46 UTCEPSS rescore
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  62. 2026-06-05 06:09 UTCEPSS rescore
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  64. 2026-06-04 13:11 UTCEPSS rescore
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  67. 2026-06-02 20:12 UTCEPSS rescore
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  69. 2026-06-01 13:51 UTCEPSS rescore
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  71. 2026-05-31 22:30 UTCEPSS rescore
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  73. 2026-05-31 00:15 UTCEPSS rescore
  74. 2026-05-31 00:15 UTCEPSS rescore
  75. 2026-05-29 13:43 UTCEPSS rescore

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2024-20434?
CVE-2024-20434 is a medium vulnerability published on September 25, 2024. A vulnerability in Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on the control plane of an affected device. This vulnerability is due to improper handling of frames with VLAN tag information. An attacker could exploit this…
When was CVE-2024-20434 disclosed?
CVE-2024-20434 was first published in the National Vulnerability Database on September 25, 2024, with the most recent update on October 8, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-20434 actively exploited?
CVE-2024-20434 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 82.7% of all scored CVEs.
What is the CVSS score of CVE-2024-20434?
CVE-2024-20434 has a CVSS v3 base score of 4.3 (NVD).
How do I remediate CVE-2024-20434?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-20434, 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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