Vulnerability in Microsoft Remote Desktop Web Client
CVE-2026-56171
Exposure of private personal information to an unauthorized actor in Windows RDP allows an unauthorized attacker to disclose information over a network.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.007 (51.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000
Affected products
- Microsoft Remote Desktop Web Client — versions 2.0.0.0
- Microsoft Remote Desktop Web Client
- Microsoft Windows Admin Center — versions 1809.0
- Microsoft Windows Admin Center
Weakness classification (CWE)
References
- Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability (vendor-advisory, patch, Release Notes, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-56171?
- CVE-2026-56171 is a high-severity vulnerability in Microsoft Remote Desktop Web Client, classified under Exposure of Private Personal Information to an Unauthorized Actor. CVSS score: 7.1/10. Published 2026-07-17.
- How severe is CVE-2026-56171?
- High severity. CVSS v3 base score is 7.1 out of 10.