CVE-2026-62803

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-11. 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.

Improper link resolution before file access ('link following') in Windows DHCP Server 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
31%
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-2026-62803

Vendor Advisories for CVE-2026-62803(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 39× in last 7d / 176× 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 310 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-62803?
CVE-2026-62803 is a high vulnerability published on August 11, 2026. Improper link resolution before file access ('link following') in Windows DHCP Server allows an authorized attacker to elevate privileges locally.
When was CVE-2026-62803 disclosed?
CVE-2026-62803 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-2026-62803 actively exploited?
CVE-2026-62803 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 69.1% of all scored CVEs.
What is the CVSS score of CVE-2026-62803?
CVE-2026-62803 has a CVSS v4.0 base score of 7.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-62803?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62803, 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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