🛡️ CVE-2026-50666 — windows-10-1607

🟠 CVSS 8.8 — High ✅ No Known Exploit CWE-416 NVD
8.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Use after free in Windows Remote Access Connection Manager allows an authorized attacker to elevate privileges over a network.

How this vulnerability can be exploited

This issue can be reached over the network, 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-2026-50666 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-2026-50666 is recorded against 12 packages.

  • windows-10-1607 (fixed in 10.0.14393.9339)
  • windows-10-1809 (fixed in 10.0.17763.9020)
  • windows-10-21h2 (fixed in 10.0.19044.7548)
  • windows-10-22h2 (fixed in 10.0.19045.7548)
  • windows-11-24h2 (fixed in 10.0.26100.8875)
  • windows-11-25h2 (fixed in 10.0.26200.8875)
  • windows-11-26h1 (fixed in 10.0.28000.2525)
  • windows-server-2012
  • windows-server-2016 (fixed in 10.0.14393.9339)
  • windows-server-2019 (fixed in 10.0.17763.9020)
  • windows-server-2022 (fixed in 10.0.20348.5386)
  • windows-server-2025 (fixed in 10.0.26100.33158)

Timeline and source

Published on 14 July 2026 and last revised on 23 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

msrc.microsoft.com

Details

Severity HIGH
CVSS Score 8.8
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE CWE-416
Public Exploit ✅ No
Source NVD
Published 2026-07-14
Updated 2026-08-11
Modified 2026-07-23

Affected Packages

Software From version Fixed in
windows-10-1607 10.0.14393.9339
windows-10-1809 10.0.17763.9020
windows-10-21h2 10.0.19044.7548
windows-10-22h2 10.0.19045.7548
windows-11-24h2 10.0.26100.8875
windows-11-25h2 10.0.26200.8875
windows-11-26h1 10.0.28000.2525
windows-server-2012
windows-server-2016 10.0.14393.9339
windows-server-2019 10.0.17763.9020
windows-server-2022 10.0.20348.5386
windows-server-2025 10.0.26100.33158

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