🛡️ CVE-2026-45639 — remote-desktop-client

🟠 CVSS 7.5 — High ✅ No Known Exploit CWE-125 NVD
7.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no 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 none, availability none.

Weakness class

CVE-2026-45639 is classified as CWE-125: Out-of-bounds Read. The code reads past the limits of a buffer, exposing adjacent memory contents or crashing the process.

Affected software

CVE-2026-45639 is recorded against 16 packages.

  • remote-desktop-client (fixed in 1.2.7214)
  • 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-app (fixed in 2.0.1193.0)
  • 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 and last revised on 23 July 2026. No public exploit is currently recorded for this entry. Record sourced from NVD.

References

msrc.microsoft.com

Details

Severity HIGH
CVSS Score 7.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE CWE-125
Public Exploit ✅ No
Source NVD
Published 2026-06-09
Updated 2026-08-11
Modified 2026-07-23
Fix URL N/A

Affected Packages

Software From version Fixed in
remote-desktop-client 1.2.7214
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-app 2.0.1193.0
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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