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CVE-2026-50655

Microsoft Windows Media Foundation Remote Code Execution Vulnerability

Published: Jul 14, 2026Updated: Jul 22, 2026 Sources: CVE List NVDCWE-122

Description

Heap-based buffer overflow in Windows Media allows an unauthorized attacker to execute code locally.

In plain language

AI Act now

CVE-2026-50655 is a Windows vulnerability in Windows Media that can let an attacker run code on your PC after you open a specially crafted media file; if you run the listed Windows versions, you should update soon because Microsoft has already published fixes.

Executive summary

CVE-2026-50655 is a heap-based buffer overflow in Windows Media that can lead to local remote code execution when an attacker can get a victim to open a maliciously crafted media input; Microsoft has released fixed builds for Windows 10/11 and Windows Server 2016/2019/2022/2025.

If affected, business impact
Full system takeoverMalware installationData theft riskOperational disruption

What to do now

  1. Check your exact Windows 10/11 or Windows Server version and OS build number (the “About” page / system info / or your IT inventory tool).
  2. Compare your build to the Microsoft fixed builds for CVE-2026-50655:
    • Windows 10: 10.0.14393.9339 OR 10.0.17763.9020 OR 10.0.19044.7548 OR 10.0.19045.7548
    • Windows 11: 10.0.26100.8875 OR 10.0.26200.8875 OR 10.0.28000.2525
    • Windows Server 2016: 10.0.14393.9339
    • Windows Server 2019: 10.0.17763.9020
    • Windows Server 2022: 10.0.20348.5386
    • Windows Server 2025: 10.0.26100.33158
  3. Install the Microsoft update(s) for CVE-2026-50655 for your system until you reach a fixed build.
  4. If patching is delayed, immediately restrict staff from opening unexpected media files (especially files received via email or chat) and ensure endpoint protection and logging are enabled so you can detect suspicious behavior.
Patch / advisory Usually a quick update

CVSS Vector Breakdown

AV:LAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:RUser Interaction
Required
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High

Weaknesses

Affected Products

and 19 more affected products View all →

Exploitability

Official Patch Available

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

1 technique
Privilege Escalation
View detailed technique mapping

References

4

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