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CVE-2026-47653: Remote Desktop Client Remote Code Execution Vulnerability

highCVSS 8.8CVE-2026-47653
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
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Who is affected
Users of Remote Desktop Client.
Urgency
Remediation is high urgency due to the potential for remote code execution and the high severity rating.
Action
Update to the latest version of Remote Desktop Client.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 8.8
Published
2026-06-09
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47653

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-2026-47653coverage & 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