What is CVE-2026-80077?

CVE-2026-80077 is a security advisory published by Microsoft Security Response Center (MSRC) with High severity. Remote Desktop Client Remote Code Execution Vulnerability

Which CVE IDs does CVE-2026-80077 cover?

CVE-2026-80077 covers the following CVE IDs: CVE-2026-80077. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-80077?

CVE-2026-80077 has a CVSS v3 base score of 8.8, published by Microsoft Security Response Center (MSRC).

Which products are affected by CVE-2026-80077?

CVE-2026-80077 affects 1 product, including: Remote Desktop client for Windows Desktop.

CVE-2026-80077HighCVSS 8.8

Remote Desktop Client Remote Code Execution Vulnerability

Vendor

Microsoft Security Response Center (MSRC)

Published

September 11, 2026

Last Modified

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🔗 CVE IDs covered (1)

CVE-2026-80077 →

📋 Description

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

🎯 Affected products1

Remote Desktop client for Windows Desktop

✅ Remediation

KBRelease Notes (Security Update) — fixed build 1.2.7279.0

🔗 References (2)

advisoryhttps://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80077
patchhttps://docs.microsoft.com/en-us/windows-server/remote/remote-desktop-services/clients/windowsdesktop-whatsnew