CVE-2026-26184

Received Received - Intake

Buffer Over-read in Windows Projected File System Elevates Privileges

Publication date: 2026-04-14

Last updated on: 2026-04-23

Assigner: Microsoft Corporation

Description

Buffer over-read in Windows Projected File System allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-04-14

Last Modified

2026-04-23

Generated

2026-07-06

AI Q&A

2026-04-15

EPSS Evaluated

2026-07-05

NVD

CVE-2026-26184

EUVD

EUVD-2026-22430

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_10_1809	to 10.0.17763.8644 (exc)
microsoft	windows_10_1809	to 10.0.17763.8644 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7184 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7184 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7184 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7184 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7184 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7184 (exc)
microsoft	windows_11_23h2	to 10.0.22631.6936 (exc)
microsoft	windows_11_23h2	to 10.0.22631.6936 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8246 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8246 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8246 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8246 (exc)
microsoft	windows_11_26h1	to 10.0.28000.1836 (exc)
microsoft	windows_11_26h1	to 10.0.28000.1836 (exc)
microsoft	windows_server_2019	to 10.0.17763.8644 (exc)
microsoft	windows_server_2022	to 10.0.20348.5020 (exc)
microsoft	windows_server_2022_23h2	to 10.0.25398.2274 (exc)
microsoft	windows_server_2025	to 10.0.26100.32690 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-126	The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations after the targeted buffer.

Attack-Flow Graph

Compliance Impact

The provided information does not specify how this vulnerability affects compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

This vulnerability is a buffer over-read in the Windows Projected File System. It allows an authorized attacker to read beyond the intended buffer boundaries, which can lead to unintended behavior.

Specifically, this flaw enables the attacker to elevate their privileges locally on the affected system.

Impact Analysis

The vulnerability can allow an authorized attacker to elevate their privileges on a Windows system locally.

Elevation of privilege means the attacker can gain higher-level permissions than originally granted.
This can lead to unauthorized access to sensitive data, modification of system settings, or installation of malicious software.
The CVSS base score of 7.8 indicates a high severity impact, affecting confidentiality, integrity, and availability.

Mitigation Strategies

To mitigate this vulnerability, apply the security updates provided by Microsoft for the Windows Projected File System as soon as possible.

Since the vulnerability allows local privilege escalation, ensure that only trusted users have local access to affected systems until patches are applied.

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