CVE-2026-20805

CRITICALNVD 5.59.0▲
EchelonGraph scoreHIGH confidence

Score elevated to 9.0 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-01-13), indicating real-world exploitation has been confirmed by US federal agencies. NVD baseline CVSS 5.5 retained for reference. Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, nvd
Trending — 5 sources updated this weekExploited in the wild
9.0EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 5%CVSS: 5.5Exploit: cisa kev · ssvc active · public exploitExposed: 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 Desktop Windows Manager allows an authorized attacker to disclose information locally.

CVSS v3
5.5
EG Score
9.0(high)
EG Risk
81(Attend)
EG Risk 81/100SSVC: Attend

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
Severity90% × 45%
Exploitation100% × 40%
Automatability0% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
5%
EPSS %ILE
92%
KEV
⚠ Exploited

Published

January 13, 2026

Last Modified

July 30, 2026

Advisory Details (2)

Auto-updated Jun 13, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-20805
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-2026-20805

Vendor Advisories for CVE-2026-20805(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 97× in last 7d / 404× 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 1,515 total refreshes for this CVE.

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

Publicly available exploits

(3 references)

Working exploit code is in the public domain (3 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCZeroDayEvil/CVE-2026-20805-PoC
    First seen Sep 10, 2026

    🛡️ Official AI Security Tool module for CVE-2026-20805 (Desktop Window Manager / dwm.exe Information Disclosure & Memory Leak Diagnostic).

    Open source ↗
  • GitHub PoCUzair-Baig0900/CVE-2026-20805-PoC
    First seen Jan 19, 2026

    The PoC of information disclosure in Microsoft Desktop Windows Management.

    Open source ↗
  • GitHub PoCfevar54/CVE-2026-20805-POC
    First seen Jan 14, 2026

    # CVE-2026-20805 PoC Prueba de concepto para la vulnerabilidad de divulgación de información en **Desktop Windows Manager (dwm.exe)** de Microsoft. ## 📋 Resumen de la Vulnerabilidad - **ID:** CVE-2026-20805 - **Producto:** Microsoft Windows

    Open source ↗

Related CVEs(same CWE)

Frequently asked(6)

What is CVE-2026-20805?
CVE-2026-20805 is a critical vulnerability published on January 13, 2026. Exposure of sensitive information to an unauthorized actor in Desktop Windows Manager allows an authorized attacker to disclose information locally.
When was CVE-2026-20805 disclosed?
CVE-2026-20805 was first published in the National Vulnerability Database on January 13, 2026, with the most recent update on July 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20805 actively exploited?
Yes. CISA added CVE-2026-20805 to the Known Exploited Vulnerabilities catalog on January 13, 2026, affecting Microsoft Windows. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-20805?
CVE-2026-20805 has a CVSS v3 base score of 5.5 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 9.0.
Which products are affected by CVE-2026-20805?
CVE-2026-20805 affects Microsoft Windows. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
How do I remediate CVE-2026-20805?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20805, 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-2026-20805

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