Remote Desktop Client Remote Code Execution Vulnerability

Date Jul 14, 2026

Type Patch Tuesday

Signal Critical vendor advisory

Vendor / Product Microsoft · Remote Desktop Client

CVE CVE-2026-54990

Critical vendor advisory CVE-2026-54990

Summary

Heap-based buffer overflow in Remote Desktop Client allows an unauthorized attacker to execute code over a network. Published in July 2026 Security Updates. MSRC exploitability: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation Less Likely.

Why it matters

Microsoft published this item through its Security Update Guide, making it part of Patch Tuesday triage for affected Windows, cloud, or application estates.

Operator check

Review the Microsoft Security Update Guide entry for CVE-2026-54990. Confirm whether Remote Desktop Client is deployed, then apply the current security update or documented mitigation. CVSS score: 9.8.

Sources

MSRC 2026-Jul Security Update Guide NVD — CVE-2026-54990 Source reference

PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.

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