CVE-2026-73462

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreHIGH confidence

Score 6.5 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. A secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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

On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the IGMP snooping agent to terminate unexpectedly. This results in a temporary disruption of multicast traffic management, which may cause multicast traffic to be flooded to all ports of the affected VLAN until the service recovers. Repeated exploitation could result in a prolonged loss of intended multicast forwarding behavior.

CVSS v3
6.5
EG Score
6.5MEDIUMhigh confidence
EG Risk
29
EG Risk 29/100CISA SSVC

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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.3%
EPSS %ILE
18th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 16, 2026

Last Modified

September 17, 2026

Advisory Details (1)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

Security Advisory 0159 - Arista

https://www.arista.com/en/support/advisories-notices/security-advisory/24715-security-advisory-0159

Vendor Advisories for CVE-2026-73462(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 19× in last 7d / 52× 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. 2026-10-05 07:50 UTCEG score recompute
  2. 2026-10-05 07:50 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 07:07 UTCEG score recompute
  5. 2026-10-04 07:07 UTCGHSA enrichment
  6. 2026-10-03 14:26 UTCEPSS rescore
  7. 2026-10-03 06:25 UTCEG score recompute
  8. 2026-10-03 06:25 UTCGHSA enrichment
  9. 2026-10-02 05:42 UTCEG score recompute
  10. 2026-10-02 05:42 UTCGHSA enrichment
  11. 2026-10-01 19:50 UTCEPSS rescore
  12. 2026-10-01 04:59 UTCEG score recompute
  13. 2026-10-01 04:59 UTCGHSA enrichment
  14. 2026-09-30 04:11 UTCEG score recompute
  15. 2026-09-30 04:11 UTCGHSA enrichment
  16. 2026-09-29 15:24 UTCEPSS rescore
  17. 2026-09-29 03:25 UTCEG score recompute
  18. 2026-09-29 03:25 UTCGHSA enrichment
  19. 2026-09-28 13:52 UTCEPSS rescore
  20. 2026-09-28 02:41 UTCEG score recompute
  21. 2026-09-28 02:41 UTCGHSA enrichment
  22. 2026-09-27 13:48 UTCEPSS rescore
  23. 2026-09-27 01:58 UTCEG score recompute
  24. 2026-09-27 01:58 UTCGHSA enrichment
  25. 2026-09-26 15:59 UTCEPSS rescore
Show 27 more
  1. 2026-09-26 01:15 UTCEG score recompute
  2. 2026-09-26 01:15 UTCGHSA enrichment
  3. 2026-09-25 00:29 UTCEG score recompute
  4. 2026-09-25 00:29 UTCGHSA enrichment
  5. 2026-09-23 23:46 UTCEG score recompute
  6. 2026-09-23 23:46 UTCGHSA enrichment
  7. 2026-09-23 17:54 UTCEPSS rescore
  8. 2026-09-22 23:02 UTCEG score recompute
  9. 2026-09-22 23:02 UTCGHSA enrichment
  10. 2026-09-21 22:20 UTCEG score recompute
  11. 2026-09-21 22:20 UTCGHSA enrichment
  12. 2026-09-21 21:09 UTCEPSS rescore
  13. 2026-09-20 21:37 UTCEG score recompute
  14. 2026-09-20 21:37 UTCGHSA enrichment
  15. 2026-09-20 20:16 UTCEPSS rescore
  16. 2026-09-19 20:54 UTCEG score recompute
  17. 2026-09-19 20:54 UTCGHSA enrichment
  18. 2026-09-18 20:11 UTCEG score recompute
  19. 2026-09-18 20:11 UTCGHSA enrichment
  20. 2026-09-18 19:28 UTCEPSS rescore
  21. 2026-09-17 19:26 UTCEG score recompute
  22. 2026-09-17 19:26 UTCGHSA enrichment
  23. 2026-09-17 18:45 UTCEG score recompute
  24. 2026-09-17 18:44 UTCGHSA enrichment
  25. 2026-09-16 19:24 UTCEG score recompute
  26. 2026-09-16 19:15 UTCEG score recompute
  27. 2026-09-16 19:14 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73462?
CVE-2026-73462 is a medium vulnerability published on September 16, 2026. On affected platforms running Arista EOS with IGMP (Internet Group Management Protocol) snooping configured (enabled by default on all VLANs), a network-adjacent unauthenticated attacker can send malformed network packets on an affected VLAN to cause the IGMP snooping agent to terminate…
When was CVE-2026-73462 disclosed?
CVE-2026-73462 was first published on September 16, 2026, with the most recent update on September 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-73462 actively exploited?
CVE-2026-73462 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (18th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-73462?
CVE-2026-73462 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-73462?
No fix for CVE-2026-73462 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-73462 are linked in the Vendor Advisories panel on this page.

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