CVE-2026-42980

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-06-09. the CNA's CVSS baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this weekElevated
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 6%CVSS: 7.8Exploit: NoneExposed: 0

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

Integer underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: 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
Severity78% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
92.2%
KEV
Not listed

Published

June 9, 2026

Last Modified

July 23, 2026

Advisory Details (1)

Auto-updated Jun 9, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42980

Vendor Advisories for CVE-2026-42980(2)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 111× 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 179 total refreshes for this CVE.

  1. 2026-07-23 14:18 UTCEPSS rescore
  2. 2026-07-23 03:12 UTCEG score recompute
  3. 2026-07-22 14:08 UTCEPSS rescore
  4. 2026-07-21 15:24 UTCEPSS rescore
  5. 2026-07-20 17:08 UTCEPSS rescore
  6. 2026-07-19 14:31 UTCEPSS rescore
  7. 2026-07-19 02:29 UTCEPSS rescore
  8. 2026-07-18 10:04 UTCEPSS rescore
  9. 2026-07-17 00:03 UTCVendor advisory
  10. 2026-07-17 00:03 UTCGHSA enrichment
  11. 2026-07-16 17:03 UTCEPSS rescore
  12. 2026-07-16 08:59 UTCVendor advisory
  13. 2026-07-16 08:59 UTCGHSA enrichment
  14. 2026-07-15 19:58 UTCVendor advisory
  15. 2026-07-15 19:58 UTCGHSA enrichment
  16. 2026-07-15 16:57 UTCEPSS rescore
  17. 2026-07-15 02:28 UTCVendor advisory
  18. 2026-07-15 02:28 UTCGHSA enrichment
  19. 2026-07-15 02:00 UTCEPSS rescore
  20. 2026-07-14 12:26 UTCVendor advisory
  21. 2026-07-14 12:26 UTCGHSA enrichment
  22. 2026-07-13 22:30 UTCEPSS rescore
  23. 2026-07-13 20:27 UTCGHSA enrichment
  24. 2026-07-13 06:13 UTCEPSS rescore
  25. 2026-07-13 02:27 UTCVendor advisory
Show 75 more
  1. 2026-07-13 02:27 UTCGHSA enrichment
  2. 2026-07-12 08:04 UTCVendor advisory
  3. 2026-07-12 08:03 UTCGHSA enrichment
  4. 2026-07-12 05:46 UTCEPSS rescore
  5. 2026-07-11 19:35 UTCVendor advisory
  6. 2026-07-11 19:35 UTCGHSA enrichment
  7. 2026-07-11 08:27 UTCEPSS rescore
  8. 2026-07-11 07:57 UTCVendor advisory
  9. 2026-07-11 07:57 UTCGHSA enrichment
  10. 2026-07-10 19:53 UTCVendor advisory
  11. 2026-07-10 19:53 UTCGHSA enrichment
  12. 2026-07-10 00:03 UTCVendor advisory
  13. 2026-07-10 00:03 UTCGHSA enrichment
  14. 2026-07-09 19:10 UTCEPSS rescore
  15. 2026-07-09 11:10 UTCVendor advisory
  16. 2026-07-09 11:10 UTCGHSA enrichment
  17. 2026-07-08 23:30 UTCVendor advisory
  18. 2026-07-08 23:30 UTCGHSA enrichment
  19. 2026-07-08 15:16 UTCEPSS rescore
  20. 2026-07-08 11:18 UTCVendor advisory
  21. 2026-07-08 11:18 UTCGHSA enrichment
  22. 2026-07-07 23:35 UTCVendor advisory
  23. 2026-07-07 23:35 UTCGHSA enrichment
  24. 2026-07-07 13:46 UTCEPSS rescore
  25. 2026-07-06 16:27 UTCEPSS rescore
  26. 2026-07-06 02:23 UTCEPSS rescore
  27. 2026-07-06 02:23 UTCEPSS rescore
  28. 2026-07-06 02:04 UTCVendor advisory
  29. 2026-07-06 02:04 UTCGHSA enrichment
  30. 2026-07-05 14:25 UTCVendor advisory
  31. 2026-07-05 14:25 UTCGHSA enrichment
  32. 2026-07-05 02:30 UTCEPSS rescore
  33. 2026-07-05 02:20 UTCVendor advisory
  34. 2026-07-05 02:20 UTCGHSA enrichment
  35. 2026-07-04 13:30 UTCVendor advisory
  36. 2026-07-04 13:30 UTCGHSA enrichment
  37. 2026-07-04 06:31 UTCEPSS rescore
  38. 2026-07-03 15:37 UTCVendor advisory
  39. 2026-07-03 15:37 UTCGHSA enrichment
  40. 2026-07-03 01:35 UTCVendor advisory
  41. 2026-07-03 01:35 UTCGHSA enrichment
  42. 2026-07-02 13:54 UTCVendor advisory
  43. 2026-07-02 13:54 UTCGHSA enrichment
  44. 2026-07-02 02:15 UTCVendor advisory
  45. 2026-07-02 02:15 UTCGHSA enrichment
  46. 2026-07-01 15:06 UTCEPSS rescore
  47. 2026-07-01 14:36 UTCVendor advisory
  48. 2026-07-01 14:36 UTCGHSA enrichment
  49. 2026-07-01 02:58 UTCVendor advisory
  50. 2026-07-01 02:58 UTCGHSA enrichment
  51. 2026-06-30 23:22 UTCEPSS rescore
  52. 2026-06-30 15:19 UTCVendor advisory
  53. 2026-06-30 15:19 UTCGHSA enrichment
  54. 2026-06-29 22:46 UTCVendor advisory
  55. 2026-06-29 22:46 UTCGHSA enrichment
  56. 2026-06-29 11:08 UTCVendor advisory
  57. 2026-06-29 11:08 UTCGHSA enrichment
  58. 2026-06-28 23:30 UTCVendor advisory
  59. 2026-06-28 23:30 UTCGHSA enrichment
  60. 2026-06-28 14:07 UTCEPSS rescore
  61. 2026-06-28 11:50 UTCVendor advisory
  62. 2026-06-28 11:50 UTCGHSA enrichment
  63. 2026-06-28 04:56 UTCEPSS rescore
  64. 2026-06-28 00:11 UTCVendor advisory
  65. 2026-06-28 00:11 UTCGHSA enrichment
  66. 2026-06-27 12:31 UTCVendor advisory
  67. 2026-06-27 12:31 UTCGHSA enrichment
  68. 2026-06-27 03:08 UTCEPSS rescore
  69. 2026-06-27 00:50 UTCVendor advisory
  70. 2026-06-27 00:50 UTCGHSA enrichment
  71. 2026-06-26 12:34 UTCVendor advisory
  72. 2026-06-26 12:34 UTCGHSA enrichment
  73. 2026-06-25 22:16 UTCVendor advisory
  74. 2026-06-25 22:16 UTCGHSA enrichment
  75. 2026-06-25 13:49 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCG4sp4rCS/CVE-2026-42980-POC
    First seen Jul 7, 2026

    CVE-2026-42980 PUBLIC EXPLOIT + RESEARCH

    Open source ↗

Frequently asked(5)

What is CVE-2026-42980?
CVE-2026-42980 is a high vulnerability published on June 9, 2026. Integer underflow (wrap or wraparound) in Windows NT OS Kernel allows an authorized attacker to elevate privileges locally.
When was CVE-2026-42980 disclosed?
CVE-2026-42980 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on July 23, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42980 actively exploited?
CVE-2026-42980 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 92.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-42980?
CVE-2026-42980 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-42980?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42980, 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-2026-42980

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