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CVE-2026-44801: Remote Desktop Client Remote Code Execution Vulnerability

highCVSS 7.5CVE-2026-44801
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

CSIRTS triage

vendor: Microsoftproduct: Remote Desktop ClientRemote code execution
What
A heap-based buffer overflow allows an unauthorized attacker to execute code over a network.
Who is affected
All users of the Remote Desktop Client on Windows systems.
Urgency
Remediation is high urgency due to the critical nature of remote code execution.
Action
Install the security patch provided by Microsoft.

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-2026-44801

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-2026-44801coverage & exploitation statusNVD · CVE.org

Recent advisories for Remote Desktop Client

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