CVE-2026-42828

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 week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0

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

Buffer over-read in Windows Projected File System Filter Driver allows an authorized attacker to elevate privileges locally.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
25%
KEV
Not listed

Published

June 9, 2026

Last Modified

August 25, 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-2026-42828

Vendor Advisories for CVE-2026-42828(2)

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 26× in last 7d / 138× 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 323 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-42828?
CVE-2026-42828 is a high vulnerability published on June 9, 2026. Buffer over-read in Windows Projected File System Filter Driver allows an authorized attacker to elevate privileges locally.
When was CVE-2026-42828 disclosed?
CVE-2026-42828 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42828 actively exploited?
CVE-2026-42828 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 75.1% of all scored CVEs.
What is the CVSS score of CVE-2026-42828?
CVE-2026-42828 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-42828?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42828, 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

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