Out-of-Bounds Read Vulnerability in Windows Projected File System by Microsoft
CVE-2025-55233

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 11 Version 25h2
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Vendor
CVE Published:
9 December 2025

What is CVE-2025-55233?

An out-of-bounds read flaw exists in the Windows Projected File System that could allow an authenticated attacker to exploit the vulnerability for local privilege escalation. Successfully exploiting this vulnerability may enable the attacker to gain elevated permissions, potentially leading to broader system compromise. Users and administrators should apply recommended updates from Microsoft to mitigate the risk associated with this issue.

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Affected Version(s)

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.8146

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.6691

Windows 10 Version 22H2 x64-based Systems 10.0.19045.0 < 10.0.19045.6691

References

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

CVSS V3.1

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

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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