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CVE-2026-57094

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 Microsoft Windows Media Foundation allows an unauthorized attacker to execute code over a network.

In plain language

AI Act now

CVE-2026-57094 is a serious Windows Media Foundation flaw that could let an attacker run code over the network; if you’re running Windows 10/11 or Windows Server from the listed versions and haven’t installed the listed security updates, you should act now.

Executive summary

CVE-2026-57094 is a Windows Media Foundation heap-based buffer overflow that can be triggered remotely to achieve unauthorized remote code execution; it affects Windows 10/11 and Windows Server 2016/2019/2022/2025 and is fixed by the listed update build numbers.

If affected, business impact
Full server/workstation takeoverMalware installation and persistenceData theft riskSystem outage risk

What to do now

  1. Check your Windows version and exact build number (Settings → System → About; on servers use “winver”).
  2. Compare your build against the fixed builds below for your edition: Windows 10 fixed at 10.0.14393.9339 / 10.0.17763.9020 / 10.0.19044.7548 / 10.0.19045.7548; Windows 11 fixed at 10.0.26100.8875 / 10.0.26200.8875 / 10.0.28000.2269 / 10.0.28000.2525; Windows Server 2016 fixed at 10.0.14393.9339; Windows Server 2019 fixed at 10.0.17763.9020; Windows Server 2022 fixed at 10.0.20348.5386; Windows Server 2025 fixed at 10.0.26100.33158.
  3. Install the Microsoft security update for CVE-2026-57094 from the Microsoft Update Guide (msrc.microsoft.com) and then reboot.
  4. Verify after reboot that your build number matches a fixed value from the list in Step 2 and that Windows Update shows the update as installed.
Patch / advisory Usually a quick update

CVSS Vector Breakdown

AV:NAC:LPR:NUI:RS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
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

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MITRE ATT&CK

2 techniques
Collection
Privilege Escalation
View detailed technique mapping

References

4

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