🛡️ CVE-2026-42905 — windows-10-1607

🟠 CVSS 7.8 — High ✅ No Known Exploit CWE-416 NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Use after free in Windows DWM Core Library allows an authorized attacker to elevate privileges locally.

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Weakness class

CVE-2026-42905 is classified as CWE-416: Use After Free. Memory is used after being released, so its contents may already belong to something else.

Affected software

CVE-2026-42905 is recorded against 14 packages.

  • unknown
  • windows-10-1607 (fixed in 10.0.14393.9234)
  • windows-10-1809 (fixed in 10.0.17763.8880)
  • windows-10-21h2 (fixed in 10.0.19044.7417)
  • windows-10-22h2 (fixed in 10.0.19045.7417)
  • windows-11-23h2 (fixed in 10.0.22631.7219)
  • windows-11-24h2 (fixed in 10.0.26100.8655)
  • windows-11-25h2 (fixed in 10.0.26200.8655)
  • windows-11-26h1 (fixed in 10.0.28000.2269)
  • windows-server-2012
  • windows-server-2016 (fixed in 10.0.14393.9234)
  • windows-server-2019 (fixed in 10.0.17763.8880)
  • windows-server-2022 (fixed in 10.0.20348.5256)
  • windows-server-2025 (fixed in 10.0.26100.32995)

Timeline and source

Published on 9 June 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

msrc.microsoft.com

Details

Severity HIGH
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-416
Public Exploit ✅ No
Source NVD
Published 2026-06-09
Updated 2026-08-11
Modified 2026-06-09
Fix URL N/A

Affected Packages

Software From version Fixed in
unknown
windows-10-1607 10.0.14393.9234
windows-10-1809 10.0.17763.8880
windows-10-21h2 10.0.19044.7417
windows-10-22h2 10.0.19045.7417
windows-11-23h2 10.0.22631.7219
windows-11-24h2 10.0.26100.8655
windows-11-25h2 10.0.26200.8655
windows-11-26h1 10.0.28000.2269
windows-server-2012
windows-server-2016 10.0.14393.9234
windows-server-2019 10.0.17763.8880
windows-server-2022 10.0.20348.5256
windows-server-2025 10.0.26100.32995

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