Out-of-bounds Read in Microsoft Remote Desktop Client
CVE-2026-45639
Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.010 (62.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 62nd percentile — 62.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.010 · change: +0.002
Affected products
- Microsoft Remote Desktop Client
- Microsoft Remote Desktop Client For Windows — versions 1.2.0.0
- Microsoft Windows 10 1607
- Microsoft Windows 10 1809
- Microsoft Windows 10 21h2
- Microsoft Windows 10 22h2
- Microsoft Windows 10 Version 1607 — versions 10.0.14393.0
- Microsoft Windows 10 Version 1809 — versions 10.0.17763.0
- Microsoft Windows 10 Version 21h2 — versions 10.0.19044.0
- Microsoft Windows 10 Version 22h2 — versions 10.0.19045.0
Weakness classification (CWE)
References
- Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-45639?
- CVE-2026-45639 is a high-severity vulnerability in Microsoft Remote Desktop Client, classified under Out-of-bounds Read. CVSS score: 7.5/10. Published 2026-06-09.
- How severe is CVE-2026-45639?
- High severity. CVSS v3 base score is 7.5 out of 10.