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 67% 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
33%
KEV
Not listed

Published

August 11, 2026

Last Modified

August 19, 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.

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 50× in last 7d / 77× 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. 2026-08-20 09:40 UTCVendor advisory
  2. 2026-08-19 21:09 UTCVendor advisory
  3. 2026-08-19 17:39 UTCEG score recompute
  4. 2026-08-19 17:39 UTCVendor advisory
  5. 2026-08-19 17:04 UTCEPSS rescore
  6. 2026-08-19 16:48 UTCVendor advisory
  7. 2026-08-19 15:26 UTCVendor advisory
  8. 2026-08-19 15:12 UTCVendor advisory
  9. 2026-08-19 14:28 UTCVendor advisory
  10. 2026-08-19 11:15 UTCVendor advisory
  11. 2026-08-18 22:41 UTCVendor advisory
  12. 2026-08-18 17:41 UTCEG score recompute
  13. 2026-08-18 17:41 UTCVendor advisory
  14. 2026-08-18 13:48 UTCEPSS rescore
  15. 2026-08-18 13:33 UTCVendor advisory
  16. 2026-08-17 18:05 UTCVendor advisory
  17. 2026-08-17 16:14 UTCEG score recompute
  18. 2026-08-17 16:14 UTCVendor advisory
  19. 2026-08-17 13:47 UTCEPSS rescore
  20. 2026-08-17 07:35 UTCVendor advisory
  21. 2026-08-16 19:05 UTCVendor advisory
  22. 2026-08-16 18:40 UTCVendor advisory
  23. 2026-08-16 17:30 UTCVendor advisory
  24. 2026-08-16 16:35 UTCEG score recompute
  25. 2026-08-16 16:35 UTCVendor advisory
Show 52 more
  1. 2026-08-16 14:56 UTCEPSS rescore
  2. 2026-08-16 11:32 UTCEG score recompute
  3. 2026-08-16 11:32 UTCVendor advisory
  4. 2026-08-15 23:02 UTCVendor advisory
  5. 2026-08-15 10:31 UTCEG score recompute
  6. 2026-08-15 10:31 UTCVendor advisory
  7. 2026-08-15 01:30 UTCEPSS rescore
  8. 2026-08-14 22:00 UTCVendor advisory
  9. 2026-08-14 21:15 UTCVendor advisory
  10. 2026-08-14 20:24 UTCVendor advisory
  11. 2026-08-14 18:36 UTCVendor advisory
  12. 2026-08-14 17:32 UTCVendor advisory
  13. 2026-08-14 17:09 UTCVendor advisory
  14. 2026-08-14 16:26 UTCEG score recompute
  15. 2026-08-14 16:26 UTCVendor advisory
  16. 2026-08-14 06:50 UTCEG score recompute
  17. 2026-08-14 06:50 UTCVendor advisory
  18. 2026-08-13 22:00 UTCEPSS rescore
  19. 2026-08-13 18:19 UTCEG score recompute
  20. 2026-08-13 18:19 UTCVendor advisory
  21. 2026-08-13 17:30 UTCVendor advisory
  22. 2026-08-13 16:20 UTCEG score recompute
  23. 2026-08-13 16:20 UTCVendor advisory
  24. 2026-08-13 12:15 UTCEG score recompute
  25. 2026-08-13 12:15 UTCVendor advisory
  26. 2026-08-13 06:43 UTCVendor advisory
  27. 2026-08-12 18:13 UTCVendor advisory
  28. 2026-08-12 15:16 UTCEG score recompute
  29. 2026-08-12 15:16 UTCVendor advisory
  30. 2026-08-12 14:24 UTCEG score recompute
  31. 2026-08-12 14:24 UTCVendor advisory
  32. 2026-08-12 13:59 UTCEG score recompute
  33. 2026-08-12 13:59 UTCVendor advisory
  34. 2026-08-12 13:51 UTCEPSS rescore
  35. 2026-08-12 05:31 UTCEG score recompute
  36. 2026-08-12 05:31 UTCVendor advisory
  37. 2026-08-12 04:22 UTCEG score recompute
  38. 2026-08-12 04:22 UTCVendor advisory
  39. 2026-08-12 00:18 UTCVendor advisory
  40. 2026-08-11 22:42 UTCVendor advisory
  41. 2026-08-11 22:07 UTCVendor advisory
  42. 2026-08-11 19:32 UTCEG score recompute
  43. 2026-08-11 19:32 UTCVendor advisory
  44. 2026-08-11 18:58 UTCEG score recompute
  45. 2026-08-11 18:58 UTCVendor advisory
  46. 2026-08-11 18:10 UTCEG score recompute
  47. 2026-08-11 18:10 UTCVendor advisory
  48. 2026-08-11 17:38 UTCEG score recompute
  49. 2026-08-11 17:38 UTCVendor advisory
  50. 2026-08-11 17:12 UTCEG score recompute
  51. 2026-08-11 17:12 UTCVendor advisory
  52. 2026-08-11 17:11 UTCMITRE cvelistV5first tracked

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 August 19, 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 67.0% 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

Explore the affected products and dependency analysis for CVE-2026-62871

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