CVE-2026-45594

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-09. the CNA's CVSS baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

Exposure of sensitive information to an unauthorized actor in Windows Application Identity (AppID) Subsystem allows an authorized attacker to disclose information locally.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
34%
KEV
Not listed

Published

June 9, 2026

Last Modified

August 25, 2026

Advisory Details (1)

Auto-updated Jun 15, 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-2026-45594

Vendor Advisories for CVE-2026-45594(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 9× in last 7d / 45× 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 243 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-45594?
CVE-2026-45594 is a medium vulnerability published on June 9, 2026. Exposure of sensitive information to an unauthorized actor in Windows Application Identity (AppID) Subsystem allows an authorized attacker to disclose information locally.
When was CVE-2026-45594 disclosed?
CVE-2026-45594 was first published in the National Vulnerability Database on June 9, 2026, with the most recent update on August 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45594 actively exploited?
CVE-2026-45594 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 66.0% of all scored CVEs.
What is the CVSS score of CVE-2026-45594?
CVE-2026-45594 has a CVSS v4.0 base score of 5.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-45594?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45594, 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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