Cyber Resilience

CVE-2025-55231

Race Condition in Microsoft Windows Server 2012 r2

Published
21 August 2025
Modified
17 June 2026
Patch / advisory
CVSS Score v3.1 7.5
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS Score 0.0048 39th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2025-55231 is a high-severity Race Condition (CWE-362) vulnerability in Microsoft Windows Server 2012. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 39th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SC-39 (Process Isolation) and SC-4 (Information in Shared System Resources) — see the control section below for these in your framework.

OWASP Top 10 for Web (2025)

EU & UK References

Vulnerability Data

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Storage allows an unauthorized attacker to execute code over a network.

CWE(s)

Related Threats

MITRE ATT&CK Enterprise Techniques

T1068 Exploitation for Privilege Escalation Privilege Escalation
Adversaries may exploit software vulnerabilities in an attempt to elevate privileges.
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2024-49120Same product: Microsoft Windows Server 2012
CVE-2024-43467Same product: Microsoft Windows Server 2012
CVE-2026-56188Same product: Microsoft Windows Server 2012
CVE-2026-50667Same product: Microsoft Windows Server 2012
CVE-2026-54999Same product: Microsoft Windows Server 2012
CVE-2026-49803Same product: Microsoft Windows Server 2012
CVE-2026-54107Same product: Microsoft Windows Server 2012
CVE-2026-45598Same product: Microsoft Windows Server 2012
CVE-2026-20848Same product: Microsoft Windows Server 2012
CVE-2026-61352Same product: Microsoft Windows Server 2012

Affected Assets

microsoft
windows server 2012
r2
microsoft
windows server 2016
≤ 10.0.14393.8416
microsoft
windows server 2019
≤ 10.0.17763.7783
microsoft
windows server 2022
≤ 10.0.20348.4161
microsoft
windows server 2025
≤ 10.0.26100.6563

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

Detect
Catch it (NIST detect / respond)

Harden
Shrink the surface (DISA STIG)

Validate
Prove the fix (OWASP ASVS)
  • V10.4.2
  • V10.4.5
  • V15.1.3
  • V15.4.1

Mitigating Controls (NIST 800-53 r5) AI

Maintaining separate execution domains for each process structurally eliminates unintended concurrent access to the same shared resources.

Preventing unintended information transfer through shared system resources directly addresses the improper concurrent modification that defines a race condition.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require proper synchronization primitives and concurrency testing that prevent race conditions.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

finds

Security testing can detect race conditions, but does not prevent them at design or coding time.

prevents

Secure SDLC mandates concurrency controls and synchronization primitives that directly prevent race conditions.

prevents

Application security requirements can specify thread-safety and locking rules, but do not prescribe implementation details.

prevents

Secure architecture principles require proper synchronization and resource isolation, addressing the root cause of CWE-362.

prevents

Secure coding standards explicitly forbid unsafe concurrent access patterns and mandate atomic operations or locks.

none

Change management reduces introduction of concurrency bugs during updates, yet does not address the weakness itself.

References