CVE-2026-73456

CRITICALPre-NVD 10.010.0—
EchelonGraph scoreHIGH confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-16. a secondary CVSS source baseline 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 10.0Exploit: None knownExposed: 0

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

Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised switch.

CVSS v3
10.0
EG Score
10.0(high)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity100% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
51%
KEV
Not listed

Published

September 16, 2026

Last Modified

September 17, 2026

Advisory Details (1)

Auto-updated Sep 24, 2026
No patch confirmed yet.
generic

Security Advisory 0158 - Arista

https://www.arista.com/en/support/advisories-notices/security-advisory/24714-security-advisory-0158

Vendor Advisories for CVE-2026-73456(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 52× in last 7d / 72× 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. 2026-09-25 08:00 UTCGHSA enrichment
  2. 2026-09-25 03:59 UTCGHSA enrichment
  3. 2026-09-24 23:58 UTCGHSA enrichment
  4. 2026-09-24 19:56 UTCGHSA enrichment
  5. 2026-09-24 15:55 UTCEG score recompute
  6. 2026-09-24 15:55 UTCGHSA enrichment
  7. 2026-09-24 11:54 UTCGHSA enrichment
  8. 2026-09-24 07:52 UTCGHSA enrichment
  9. 2026-09-24 03:51 UTCGHSA enrichment
  10. 2026-09-23 23:40 UTCGHSA enrichment
  11. 2026-09-23 19:39 UTCEG score recompute
  12. 2026-09-23 19:39 UTCGHSA enrichment
  13. 2026-09-23 17:54 UTCEPSS rescore
  14. 2026-09-23 15:38 UTCGHSA enrichment
  15. 2026-09-23 11:36 UTCGHSA enrichment
  16. 2026-09-23 07:35 UTCGHSA enrichment
  17. 2026-09-23 03:34 UTCGHSA enrichment
  18. 2026-09-22 23:33 UTCGHSA enrichment
  19. 2026-09-22 19:26 UTCEG score recompute
  20. 2026-09-22 19:26 UTCGHSA enrichment
  21. 2026-09-22 15:25 UTCGHSA enrichment
  22. 2026-09-22 11:24 UTCGHSA enrichment
  23. 2026-09-22 07:23 UTCGHSA enrichment
  24. 2026-09-22 03:21 UTCGHSA enrichment
  25. 2026-09-21 23:19 UTCEG score recompute
Show 47 more
  1. 2026-09-21 23:19 UTCGHSA enrichment
  2. 2026-09-21 21:09 UTCEPSS rescore
  3. 2026-09-21 19:18 UTCGHSA enrichment
  4. 2026-09-21 15:17 UTCGHSA enrichment
  5. 2026-09-21 11:16 UTCGHSA enrichment
  6. 2026-09-21 07:14 UTCGHSA enrichment
  7. 2026-09-21 03:05 UTCGHSA enrichment
  8. 2026-09-20 23:03 UTCEG score recompute
  9. 2026-09-20 23:03 UTCGHSA enrichment
  10. 2026-09-20 20:16 UTCEPSS rescore
  11. 2026-09-20 18:59 UTCGHSA enrichment
  12. 2026-09-20 14:57 UTCGHSA enrichment
  13. 2026-09-20 10:56 UTCGHSA enrichment
  14. 2026-09-20 06:54 UTCGHSA enrichment
  15. 2026-09-20 02:47 UTCGHSA enrichment
  16. 2026-09-19 22:46 UTCGHSA enrichment
  17. 2026-09-19 18:45 UTCEG score recompute
  18. 2026-09-19 18:45 UTCGHSA enrichment
  19. 2026-09-19 14:44 UTCGHSA enrichment
  20. 2026-09-19 10:43 UTCGHSA enrichment
  21. 2026-09-19 06:37 UTCGHSA enrichment
  22. 2026-09-19 02:36 UTCGHSA enrichment
  23. 2026-09-18 22:35 UTCEG score recompute
  24. 2026-09-18 22:35 UTCGHSA enrichment
  25. 2026-09-18 19:28 UTCEPSS rescore
  26. 2026-09-18 18:34 UTCGHSA enrichment
  27. 2026-09-18 14:26 UTCGHSA enrichment
  28. 2026-09-18 10:25 UTCGHSA enrichment
  29. 2026-09-18 06:24 UTCGHSA enrichment
  30. 2026-09-18 02:22 UTCGHSA enrichment
  31. 2026-09-17 22:20 UTCEG score recompute
  32. 2026-09-17 22:20 UTCGHSA enrichment
  33. 2026-09-17 18:18 UTCGHSA enrichment
  34. 2026-09-17 12:20 UTCEG score recompute
  35. 2026-09-17 12:20 UTCGHSA enrichment
  36. 2026-09-17 11:49 UTCEG score recompute
  37. 2026-09-17 11:49 UTCGHSA enrichment
  38. 2026-09-17 08:23 UTCGHSA enrichment
  39. 2026-09-17 04:19 UTCEG score recompute
  40. 2026-09-17 04:19 UTCGHSA enrichment
  41. 2026-09-17 04:05 UTCEG score recompute
  42. 2026-09-17 04:05 UTCGHSA enrichment
  43. 2026-09-17 01:01 UTCEG score recompute
  44. 2026-09-17 01:01 UTCGHSA enrichment
  45. 2026-09-16 19:24 UTCEG score recompute
  46. 2026-09-16 19:00 UTCEG score recompute
  47. 2026-09-16 18:59 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-73456?
CVE-2026-73456 is a critical vulnerability published on September 16, 2026. Under certain circumstances on affected platforms running Arista EOS with gRPC Network Packet Sampling Interface (gNPSI) enabled, an unauthenticated gNPSI client can craft a malicious request to allow arbitrary code execution, granting an attacker full administrative control over the compromised…
When was CVE-2026-73456 disclosed?
CVE-2026-73456 was first published in the National Vulnerability Database 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-2026-73456 actively exploited?
CVE-2026-73456 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.1% of all scored CVEs.
What is the CVSS score of CVE-2026-73456?
CVE-2026-73456 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-73456?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-73456, 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-73456

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