Race Condition Vulnerability in Windows SMB Service by Microsoft
CVE-2026-58531

7.5HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1607
Windows 10 Version 1809
Windows 10 Version 21h2
Windows 10 Version 22h2
Vendor
CVE Published:
14 July 2026

What is CVE-2026-58531?

A race condition in the Windows SMB service allows an authorized attacker to exploit improper synchronization when accessing shared resources. This can lead to unauthorized privilege escalation over a network, potentially compromising sensitive information and enabling further attacks. Users are encouraged to implement the recommended patches and stay updated to mitigate associated risks.

Affected Version(s)

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.9339

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.9020

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7548

References

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

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.