Home/CVE/External control of file name or path in .NET, Visual Studio, and Build Tools for Visual Studio allows an authorized att
CVE

CVE-2025-26646

External control of file name or path in .NET, Visual Studio, and Build Tools for Visual Studio allows an authorized att

External control of file name or path in .NET, Visual Studio, and Build Tools for Visual Studio allows an authorized attacker to perform spoofing over a network.

HIGH · CVSS 8 EPSS 0.00101
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules15 YARA rules0
⬡

Weakness Classification

CWE-73External Control of File Name or Path
▤

Affected Products & Versions

7
microsoft build tools< 17.13.7
microsoft visual studio 2022>= 17.8.0 and < 17.8.21
microsoft visual studio 2022>= 17.10.0 and < 17.10.15
microsoft visual studio 2022>= 17.12.0 and < 17.12.8
microsoft visual studio 2022>= 17.13.0 and < 17.13.7
microsoft .net>= 9.0.0 and < 9.0.5
microsoft .net>= 8.0.0 and < 8.0.16
▤

Affected Packages

1
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
NuGet Microsoft.Build.Tasks.Core HIGH fixed in 15.9.30
◈

Sigma Hunt Rules

15
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighSuspicious Microsoft Office Child Process - MacOS
producthighRemote Access Tool - Renamed MeshAgent Execution - MacOS
producthighBinary Padding - MacOS
productmediumSuspicious Execution via macOS Script Editor
productmediumSystem Information Discovery Via Sysctl - MacOS
productmediumNew File Exclusion Added To Time Machine Via Tmutil - MacOS
▣

Scoring & Timeline

8
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD13 May 2025 · 10:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

11
rhsaRHSA-2026:9080Important
rhsaRHSA-2026:9205Important
usnUSN-7509-1
rhsaRHSA-2025:7603Important
rhsaRHSA-2025:7571Important
Intelligence Graph · click any node to traverse
CVETechnique ActorTool Family
drag to reposition · click any node to traverse · button top-right enlarges
External lookups - second-class, for what we don’t hold ourselves
NVDCVE.orgCISAVulnersExploit-DBGitHub PoCVulnCheck KEVGreyNoise
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