Heap-based Buffer Overflow in Windows Media by Microsoft
CVE-2026-58542

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 24h2
Windows 11 Version 25h2
Windows 11 Version 26h1
Windows Server 2025
Vendor
CVE Published:
14 July 2026

What is CVE-2026-58542?

A heap-based buffer overflow vulnerability in Microsoft's Windows Media product enables an unauthorized attacker to execute arbitrary code on the affected system. This flaw arises when specific input is processed, potentially granting an attacker the ability to control the system remotely. Users are advised to apply available patches promptly to mitigate the risks associated with this vulnerability.

Affected Version(s)

Windows 11 Version 24H2 ARM64-based Systems 10.0.26100.0 < 10.0.26100.8875

Windows 11 Version 25H2 ARM64-based Systems 10.0.26200.0 < 10.0.26100.8875

Windows 11 version 26H1 ARM64-based Systems 10.0.28000.0 < 10.0.28000.2525

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisorypatch

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.