Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Microsoft Remote Desktop Web Client — Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N U H N N 7.5 .0048 39.5 —
AFFECTED
Product Versions Fixed
Remote Desktop Web Client 2.0.0.0 – —
Windows Admin Center 1809.0 – —
TIMELINE
Jun 19 Reserved by microsoft
Jul 17 Published (CNA: microsoft)
Jul 22 RESCORED — CVE-2026-56171 (Microsoft Remote Desktop Web Client). CVSS 7.1 → 7.5 (NVD).
Description
Exposure of private personal information to an unauthorized actor in Windows RDP allows an unauthorized attacker to disclose information over a network.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| June 19, 2026 | Reserved | Reserved by microsoft |
| July 17, 2026 | Published | Published (CNA: microsoft) |
| July 22, 2026 | RESCORED | RESCORED — CVE-2026-56171 (Microsoft Remote Desktop Web Client). CVSS 7.1 → 7.5 (NVD). |
Affected
Affected products and packages — 2 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Microsoft | Remote Desktop Web Client | — | 2.0.0.0 | — |
| Microsoft | Windows Admin Center | — | 1809.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-56171 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.