CVE-2025-29804: Visual Studio 2022 Privilege Escalation

CVE-2025-29804 Overview

CVE-2025-29804 is an improper access control vulnerability in Microsoft Visual Studio 2022 that enables local privilege escalation. An authorized attacker with low privileges on the target system can leverage the flaw to gain elevated permissions. The weakness is classified under [CWE-284] Improper Access Control. Exploitation requires user interaction and local access, making it a post-compromise or insider-oriented attack path rather than a remote entry point. Microsoft has published a security advisory and patch through the Microsoft Security Response Center.

Critical Impact
A local, authenticated attacker can elevate privileges on systems running Microsoft Visual Studio 2022, gaining high impact on confidentiality, integrity, and availability.

Affected Products

Microsoft Visual Studio 2022
Windows developer workstations with Visual Studio 2022 installed
Build servers running Visual Studio 2022 components

Discovery Timeline

2025-04-08 - CVE-2025-29804 published to NVD and Microsoft security advisory released
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-29804

Vulnerability Analysis

The vulnerability stems from improper access control within Microsoft Visual Studio 2022. Access decisions on protected resources are not correctly enforced, allowing a lower-privileged user context to reach functionality or resources reserved for higher-privileged contexts. The flaw is local in nature and requires the attacker to already possess valid credentials and the ability to run code on the target host. Successful exploitation yields elevated privileges, with high impact across confidentiality, integrity, and availability. According to EPSS data dated 2026-07-27, the probability of exploitation activity is 1.234% at the 65.9 percentile.

Root Cause

The root cause is an [CWE-284] Improper Access Control weakness in a Visual Studio 2022 component. Microsoft's advisory attributes the condition to insufficient authorization checks that fail to separate low-privileged user operations from privileged operations performed by Visual Studio processes or installers. This allows an authenticated user to influence a workflow that runs with higher privileges.

Attack Vector

Exploitation requires local access, low privileges, and user interaction. A typical attack path involves an attacker with a standard user account tricking a higher-privileged user into launching a Visual Studio workflow, or planting attacker-controlled content that a privileged Visual Studio process later loads or acts upon. Because the access-control failure is inside a locally executed developer toolchain, common vectors include manipulating writable paths, project files, or component metadata that privileged Visual Studio operations trust without adequate validation. No public proof-of-concept or exploit code is currently listed in Exploit-DB, and CISA KEV has not flagged the CVE as exploited in the wild. See the Microsoft CVE-2025-29804 Advisory for vendor technical details.

Detection Methods for CVE-2025-29804

Indicators of Compromise

Unexpected child processes spawned by devenv.exe, MSBuild.exe, or Visual Studio installer components running with elevated tokens.
New or modified files under Visual Studio installation directories or shared component paths written by non-administrative users.
Non-developer accounts launching Visual Studio-associated privileged operations outside normal working hours.

Detection Strategies

Enable Windows process creation auditing (Event ID 4688) and alert on Visual Studio processes launching cmd, PowerShell, or script hosts with elevated integrity.
Monitor file integrity on Visual Studio installation paths, extension directories, and any shared build components.
Correlate low-privileged user activity with subsequent privileged operations initiated from developer tooling.

Monitoring Recommendations

Ingest Windows Security, Sysmon, and EDR telemetry from developer workstations and build servers into a centralized analytics platform.
Track Visual Studio version and patch level across the fleet to identify unpatched hosts at risk.
Baseline typical Visual Studio child-process behavior and alert on deviations such as privileged writes to user-writable directories.

How to Mitigate CVE-2025-29804

Immediate Actions Required

Apply the Microsoft security update for Visual Studio 2022 referenced in the Microsoft CVE-2025-29804 Advisory.
Inventory all hosts with Visual Studio 2022 installed, including build agents and CI runners, and prioritize patching.
Restrict local logon on developer workstations and build servers to trusted accounts only.

Patch Information

Microsoft has issued a security update for Visual Studio 2022 addressing CVE-2025-29804. Administrators should install the latest servicing baseline via the Visual Studio Installer or through managed update tooling. Refer to the Microsoft CVE-2025-29804 Advisory for the specific fixed build numbers per servicing channel.

Workarounds

Limit interactive and remote-desktop access to systems running Visual Studio 2022 until patches are deployed.
Enforce least privilege for developer accounts and remove unnecessary local administrator rights.
Restrict write permissions on Visual Studio installation directories and shared component paths to administrative principals.

bash

# Verify installed Visual Studio 2022 instances and versions on a Windows host
"%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\vswhere.exe" -products * -format json

# Trigger an update to the latest patched channel build
"%ProgramFiles(x86)%\Microsoft Visual Studio\Installer\setup.exe" update ^
  --installPath "C:\Program Files\Microsoft Visual Studio\2022\Enterprise" ^
  --passive --norestart