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CVE-2026-61363: Remote Desktop Client Remote Code Execution Vulnerability

highCVSS 7.5CVE-2026-61363
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 executionMemory corruption
What
Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network.
Who is affected
Systems running Microsoft Remote Desktop Client exposed to untrusted RDP sources.
Urgency
High severity (CVSS 7.5); unauthenticated remote code execution requires immediate patching.
Action
Apply security updates from Microsoft for Remote Desktop Client as a priority.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
high — CVSS 7.5
Published
2026-08-11
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-61363

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-2026-61363coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

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.

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