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CVE-2026-42908: Windows Remote Desktop Protocol (RDP) Information Disclosure Vulnerability

highCVSS 7.5CVE-2026-42908
Out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.

CSIRTS triage

vendor: Microsoftproduct: Windows Remote Desktop Protocol (RDP)Information disclosure
What
An out-of-bounds read in Windows RDP allows an unauthorized attacker to disclose information over a network.
Who is affected
Users of Windows RDP are affected.
Urgency
High urgency due to the severity of the information disclosure risk, with no current exploitation reported.
Action
Update to the latest version of Windows RDP immediately.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.5
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42908

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-42908coverage & exploitation statusNVD · CVE.org

Recent advisories for Windows Remote Desktop

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center