CVE-2026-49798

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

Score 9.3 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-14. the CNA's CVSS baseline 9.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: None knownExposed: 0

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

Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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
Severity93% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
29%
KEV
Not listed

Published

July 14, 2026

Last Modified

August 28, 2026

Advisory Details (1)

Auto-updated Aug 29, 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-2026-49798

Vendor Advisories for CVE-2026-49798(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 59× in last 7d / 366× 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 495 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-49798?
CVE-2026-49798 is a critical vulnerability published on July 14, 2026. Use after free in Windows Kernel allows an unauthorized attacker to elevate privileges locally.
When was CVE-2026-49798 disclosed?
CVE-2026-49798 was first published in the National Vulnerability Database on July 14, 2026, with the most recent update on August 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-49798 actively exploited?
CVE-2026-49798 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 70.8% of all scored CVEs.
What is the CVSS score of CVE-2026-49798?
CVE-2026-49798 has a CVSS v4.0 base score of 9.3 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-49798?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-49798, 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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