CVE-2026-62751

Analyzed Analyzed - Analysis Complete

Windows Projected File System Integer Overflow

Publication date: 2026-08-11

Last updated on: 2026-08-13

Assigner: Microsoft Corporation

Description

Integer overflow or wraparound in Windows Projected File System allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-11

Last Modified

2026-08-13

Generated

2026-09-01

AI Q&A

2026-08-11

EPSS Evaluated

2026-08-30

NVD

CVE-2026-62751

EUVD

EUVD-2026-56652

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7663 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7517 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7517 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9106 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2704 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9106 (exc)
microsoft	windows_server_2022	to 10.0.20348.5440 (exc)
microsoft	windows_server_2025	to 10.0.26100.33222 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-190	The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Attack-Flow Graph

Executive Summary

This vulnerability is an integer overflow or wraparound flaw in the Windows Projected File System. An authorized attacker can exploit this to elevate their privileges locally on a vulnerable system.

Detection Guidance

This vulnerability involves an integer overflow in Windows Projected File System. Detection requires checking for unusual file system activity or privilege escalation events. Review Windows Event Logs for Event ID 4624 (successful logons) and Event ID 4672 (special privileges assigned). Use PowerShell commands like Get-WinEvent -LogName Security | Where-Object {$_.Id -eq 4624 -or $_.Id -eq 4672} to filter relevant events.

Impact Analysis

If exploited, this vulnerability allows an attacker with local access to gain higher privileges on your system. This could lead to unauthorized control over your system or data.

Compliance Impact

This vulnerability allows local privilege escalation, which could enable unauthorized access to sensitive data. For GDPR, this may lead to unauthorized processing or access to personal data, violating confidentiality requirements. For HIPAA, it could permit unauthorized access to protected health information, compromising security controls.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Projected File System vulnerability. Monitor Microsoft's update guide for patches and install them promptly.

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