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Vulnerabilities

Vulnerability · CVE-2026-71347

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Security Center allows an authorized attacker to elevate privileges locally.

Published Oct 13, 2026 · catalog updated Oct 15, 2026 · Microsoft Windows

Check if you run it

No confirmed exploitation is on record for CVE-2026-71347. EPSS is 0.22%. Act only if a listed version of Microsoft Windows is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
Medium6.4
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.22%
Remediation
Advisory link
Affected products
microsoft Windows 10 Version 1607 for 32-bit Systems · microsoft Windows 10 Version 1607 for x64-based Systems · microsoft Windows 10 Version 1809 for 32-bit Systems · microsoft Windows 10 Version 1809 for x64-based Systems · microsoft Windows 10 Version 21H2 for 32-bit Systems · microsoft Windows 10 Version 21H2 for ARM64-based Systems

Affected Microsoft products: Windows 10 Version 1607 for x64-based Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 1607 for 32-bit Systems, Windows 11 Version 23H2 for ARM64-based Systems, Windows 11 Version 23H2 for x64-based Systems, Windows 10 Version 22H2 for 32-bit Systems, Windows 10 Version 21H2 for x64-based Systems.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • microsoft Windows 10 Version 1607 for 32-bit Systemsversion unspecified
  • microsoft Windows 10 Version 1607 for x64-based Systemsversion unspecified
  • microsoft Windows 10 Version 1809 for 32-bit Systemsversion unspecified
  • microsoft Windows 10 Version 1809 for x64-based Systemsversion unspecified
  • microsoft Windows 10 Version 21H2 for 32-bit Systemsversion unspecified
  • microsoft Windows 10 Version 21H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 10 Version 21H2 for x64-based Systemsversion unspecified
  • microsoft Windows 10 Version 22H2 for 32-bit Systemsversion unspecified
  • microsoft Windows 10 Version 22H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 10 Version 22H2 for x64-based Systemsversion unspecified
  • microsoft Windows 11 Version 23H2 for ARM64-based Systemsversion unspecified
  • microsoft Windows 11 Version 23H2 for x64-based Systemsversion unspecified

How to fix CVE-2026-71347

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-71347. EPSS is 0.22%. Act only if a listed version of Microsoft Windows is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-362: Race Condition; CWE-416: Use After Free. EPSS 0.22%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Technology hubs

Windows security

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 13, 2026 · NIST NVD

    Detected

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Security Center allows an authorized attacker to elevate privileges locally.

  2. Oct 15, 2026 · NIST NVD

    Updated

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Security Center allows an authorized attacker to elevate privileges locally.

Sources

  • CVE.orgVulnerability recordCVE-2026-71347

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-71347

    30-day exploitation probability 0.2%

    first.org
  • Microsoft Security Update GuideVendor advisoryCVE-2026-71347

    Windows 10 Version 1607 for x64-based Systems, Windows 10 Version 22H2 for ARM64-based Systems, Windows 10 Version 21H2 for ARM64-based Systems, Windows 10 Version 1607 for 32-bit Systems

    msrc.microsoft.com
  • NIST NVDVulnerability recordCVE-2026-71347

    Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Security Center allows an authorized attacker to elevate privileges locally.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.