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CVE-2026-58542

Windows Media Remote Code Execution Vulnerability

Published: Jul 14, 2026Updated: Jul 22, 2026 Sources: CVE List NVDCWE-122
7.8HIGH
NVD MITRE
EPSS Score
0.4%
Top 70.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

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

In plain language

AI Act now

CVE-2026-58542 is a Windows Media security flaw that can let a nearby attacker run code on Windows 11 or Windows Server 2025; most small businesses should act quickly because it requires getting the attacker close but it can still lead to full system compromise once triggered.

Executive summary

CVE-2026-58542 is a heap-based buffer overflow in Windows Media that enables local remote code execution with no prior login, requiring the attacker to be able to induce the vulnerable operation (unauthorized code execution path).

If affected, business impact
Full device takeoverMalware installationBusiness downtimeData theft risk

What to do now

  1. Check whether your organization uses Windows Media features on Windows 11 and/or Windows Server 2025 (especially any setups that may trigger Windows Media processing).
  2. Verify your current OS build against the fixed builds listed by Microsoft for CVE-2026-58542.
  3. Update Windows 11 to one of: 10.0.26100.8875, 10.0.26200.8875, or 10.0.28000.2269 (whichever matches your branch), or later.
  4. Update Windows Server 2025 to 10.0.26100.33158 (or later).
  5. If you cannot immediately patch, restrict who can access the affected Windows machines in ways that would allow an attacker to induce the Windows Media behavior, and prioritize installing the Microsoft fix as soon as possible.
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
Open in CVSS calculator →

Weaknesses

CWE-122

Affected Products

Microsoft
commercial·US
Windows 11 Version 24H2On-premOS
Operating Systems / windows
Windows Server 2025 (Server Core installation)On-premOS
Operating Systems / windows
and 7 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2026-58542?We can run the check for you — a free external exposure review, no install. Check my exposure

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

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58542
msrc.microsoft.com
News mentions
4

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