CVE-2026-56171 | BDVDB-2026-349263 Detail

MicrosoftRemote Desktop Web Client

Description#

Exposure of private personal information to an unauthorized actor in Windows RDP allows an unauthorized attacker to disclose information over a network.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact low, availability impact none. Attack vector: network.

Weaknesses#

CWE-359 Exposure of Private Personal Information to an Unauthorized Actor

References#

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56171

Exploit#

No public exploit known

History#

Version 12026-07-17Record published in the CVE List.
Version 22026-11-01Most recent update recorded in the CVE List.

Published

Published: 2026-07-17
Last modified: 2026-11-01

Vendor information

Vendor: Microsoft
Product: Remote Desktop Web Client

All Microsoft vulnerabilities

Score

7.1 High

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 51.9.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
>= 2.0.0.0 and < 2.1.65.2
Fixed
2.1.65.2

Scoring System

CVSS v4.0

Not available

CVSS v3.1

7.1 High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	Required
Scope	Unchanged
Confidentiality	High
Integrity	Low
Availability	None

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).