CVE-2026-62800

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-11. The CNA's CVSS baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.9%CVSS: 8.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over a network.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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
Severity88% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.9%
EPSS %ILE
58th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 11, 2026

Last Modified

September 29, 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-2026-62800

Vendor Advisories for CVE-2026-62800(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 29× in last 7d / 158× 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 401 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-62800?
CVE-2026-62800 is a high vulnerability published on August 11, 2026. Heap-based buffer overflow in Windows SMB Server allows an authorized attacker to execute code over a network.
When was CVE-2026-62800 disclosed?
CVE-2026-62800 was first published on August 11, 2026, with the most recent update on September 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62800 actively exploited?
CVE-2026-62800 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.9% probability of exploitation in the next 30 days (58th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-62800?
CVE-2026-62800 has a CVSS base score of 8.8 (the CNA's own assessment, by microsoft; NVD's own analysis pending).
How do I remediate CVE-2026-62800?
A fix for CVE-2026-62800 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-62800 are linked in the Vendor Advisories panel on this page.

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