CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

← Back to feed

CVE-2026-48563: Remote Desktop Client Remote Code Execution Vulnerability

highCVSS 7.5CVE-2026-48563
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
Deployments of Remote Desktop Client are affected.
Urgency
Remediation is urgent due to the high severity of the vulnerability, with a CVSS score of 7.5.
Action
Apply the latest security patch for Remote Desktop Client.

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

⚡ Watch Remote Desktop Client

Get an email when a new Remote Desktop Client advisory drops — max one per day, one-click unsubscribe.

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-2026-48563

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-2026-48563coverage & 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