CVE-2026-62871

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under the CNA's CVSS (NVD's own analysis pending). EPSS exploit probability: 0.4%, top 66% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: cna:microsoft, epss
Trending — 3 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.

Out-of-bounds write in .NET allows an unauthorized attacker to execute code 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
34%
KEV
Not listed

Published

August 11, 2026

Last Modified

September 16, 2026

Advisory Details (1)

Auto-updated Aug 11, 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-2026-62871

Vendor Advisories for CVE-2026-62871(2)

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

Affected Packages

(3 across 1 ecosystem)
NuGet(3)
PackageVulnerable rangeFixed inDependents
Microsoft.WindowsDesktop.App.Runtime.win-arm648.0.0 ... 8.0.8 (29 versions)8.0.30—
Microsoft.WindowsDesktop.App.Runtime.win-x648.0.0 ... 8.0.8 (29 versions)8.0.30—
Microsoft.WindowsDesktop.App.Runtime.win-x868.0.0 ... 8.0.8 (29 versions)8.0.30—

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 117× 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 193 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-62871?
CVE-2026-62871 is a high vulnerability published on August 11, 2026. Out-of-bounds write in .NET allows an unauthorized attacker to execute code locally.
When was CVE-2026-62871 disclosed?
CVE-2026-62871 was first published in the National Vulnerability Database on August 11, 2026, with the most recent update on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62871 actively exploited?
CVE-2026-62871 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 66.4% of all scored CVEs.
What is the CVSS score of CVE-2026-62871?
CVE-2026-62871 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-62871?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62871, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-62871

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