CVE-2026-73462

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

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, GitHub Security Advisory, a secondary CVSS source

Also known asEUVD-2026-81010 (ENISA EUVD) · GHSA-m8c5-pmmq-7x3q (GitHub Security Advisories)Source: ENISA EUVD

6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 6.5Exploit: None knownExposed services: Not assessed

CVE-2026-73462 has been fixed in the following releases: * 4.36.2F and later releases in the 4.36.x train (from the CVE record's solution, Arista Networks, Inc.) — apply it.

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
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity65% × 45%
Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: CVE-2026-73462 has been fixed in the following releases: * 4.36.2F and later releases in the 4.36.x train (from the CVE record's solution, Arista Networks, Inc.). Apply it within your standard update timelines.
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.

EG Severity
6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

CVE-2026-73462 has been fixed in the following releases: * 4.36.2F and later releases in the 4.36.x train (from the CVE record's solution, Arista Networks, Inc.). Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

September 16, 2026

Last Modified

September 17, 2026

Advisory Details (1)

Auto-updated Sep 16, 2026
Fix named in the CVE record's solution (Arista Networks, Inc.).

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 6× in last 7d / 51× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-31 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  3. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  4. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  5. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  6. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  7. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  8. 2026-10-25 14:05 UTCEG score recompute
  9. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  10. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  11. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  12. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  13. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  14. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  15. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  16. 2026-10-18 03:15 UTCEG score recompute
  17. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  18. 2026-10-16 21:58 UTCEG score recompute
  19. 2026-10-16 21:57 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  20. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  21. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  22. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  23. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  24. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  25. 2026-10-12 15:41 UTCEG score recompute
Show 73 more
  1. 2026-10-11 19:26 UTCEG score recompute
  2. 2026-10-11 16:42 UTCEG score recompute
  3. 2026-10-11 15:05 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  4. 2026-10-11 14:01 UTCEG score recompute
  5. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  6. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  7. 2026-10-10 14:22 UTCEG score recompute
  8. 2026-10-10 14:22 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  9. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  10. 2026-10-09 13:39 UTCEG score recompute
  11. 2026-10-09 13:39 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-10-08 10:10 UTCEG score recompute
  14. 2026-10-08 10:10 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  15. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  16. 2026-10-07 09:25 UTCEG score recompute
  17. 2026-10-07 09:25 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  18. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  19. 2026-10-06 08:42 UTCEG score recompute
  20. 2026-10-06 08:42 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  21. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  22. 2026-10-05 07:50 UTCEG score recompute
  23. 2026-10-05 07:50 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  24. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  25. 2026-10-04 07:07 UTCEG score recompute
  26. 2026-10-04 07:07 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  27. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  28. 2026-10-03 06:25 UTCEG score recompute
  29. 2026-10-03 06:25 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  30. 2026-10-02 05:42 UTCEG score recompute
  31. 2026-10-02 05:42 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  32. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  33. 2026-10-01 04:59 UTCEG score recompute
  34. 2026-10-01 04:59 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  35. 2026-09-30 04:11 UTCEG score recompute
  36. 2026-09-30 04:11 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  37. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  38. 2026-09-29 03:25 UTCEG score recompute
  39. 2026-09-29 03:25 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  40. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  41. 2026-09-28 02:41 UTCEG score recompute
  42. 2026-09-28 02:41 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  43. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  44. 2026-09-27 01:58 UTCEG score recompute
  45. 2026-09-27 01:58 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  46. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  47. 2026-09-26 01:15 UTCEG score recompute
  48. 2026-09-26 01:15 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  49. 2026-09-25 00:29 UTCEG score recompute
  50. 2026-09-25 00:29 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  51. 2026-09-23 23:46 UTCEG score recompute
  52. 2026-09-23 23:46 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  53. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  54. 2026-09-22 23:02 UTCEG score recompute
  55. 2026-09-22 23:02 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  56. 2026-09-21 22:20 UTCEG score recompute
  57. 2026-09-21 22:20 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  58. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  59. 2026-09-20 21:37 UTCEG score recompute
  60. 2026-09-20 21:37 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  61. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  62. 2026-09-19 20:54 UTCEG score recompute
  63. 2026-09-19 20:54 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  64. 2026-09-18 20:11 UTCEG score recompute
  65. 2026-09-18 20:11 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  66. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  67. 2026-09-17 19:26 UTCEG score recompute
  68. 2026-09-17 19:26 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  69. 2026-09-17 18:45 UTCEG score recompute
  70. 2026-09-17 18:44 UTCGHSA enrichmentGHSA-m8c5-pmmq-7x3q · GitHub severity HIGH · GitHub CVSS 6.5
  71. 2026-09-16 19:24 UTCEG score recompute
  72. 2026-09-16 19:15 UTCEG score recomputeFirst assessed: 6.5 MEDIUM
  73. 2026-09-16 19:14 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-73462?
CVE-2026-73462 is a medium-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-73462 published?
The CVE record for CVE-2026-73462 was published on September 16, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
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 (20th 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?
The CVE record's solution for CVE-2026-73462, written by its CNA Arista Networks, Inc., names the fix: "CVE-2026-73462 has been fixed in the following releases: * 4.36.2F and later releases in the 4.36.x train". The vendor advisories EchelonGraph has for CVE-2026-73462 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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