CVE-2025-21204

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-04-08. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Elevated
7.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 7.0%CVSS: 7.8Exploit: Elevated riskExposed services: Not assessed

A fix is referenced (a reference tagged "Patch", often a source commit), but no release containing it is confirmed — find the release that contains it; until it is applied, mitigate (WAF / firewall / segmentation).

Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
51
EG Risk 51/100

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%
Exploitation40% × 40%
Automatability0% × 15%
EPSS PROB
7.0%
EPSS %ILE
94th
KEV
Not listed

Published

April 8, 2025

Last Modified

August 10, 2026

Advisory Details (1)

Auto-updated Aug 10, 2026
Fix referenced — no release confirmed yet. Sources: microsoft.
microsoftMentions a patch (unverified)

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-2025-21204

Vendor Advisories for CVE-2025-21204(1)

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 7× in last 7d / 28× 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 155 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Public exploit code is referenced for this CVE (1 GitHub PoC). Defenders should treat patch urgency accordingly.

  • GitHub PoCmmotti/Reset-inetpub
    Published Apr 24, 2025

    Restore the integrity of the parent 'inetpub' folder following security implications highlighted by CVE-2025-21204.

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2025-21204?
CVE-2025-21204 is a high vulnerability published on April 8, 2025. Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.
When was CVE-2025-21204 disclosed?
CVE-2025-21204 was first published on April 8, 2025, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-21204 actively exploited?
CVE-2025-21204 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 7.0% probability of exploitation in the next 30 days (94th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2025-21204?
CVE-2025-21204 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2025-21204?
A fix for CVE-2025-21204 is referenced (a reference tagged "Patch", often a source commit), but EchelonGraph has no release containing it on record. Check that reference and the vendor's advisory for a release that contains the fix and update to it; until then, restrict network exposure of the affected system or apply the vendor's mitigation. The vendor advisories EchelonGraph has for CVE-2025-21204 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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