External Control of File Name or Path in Microsoft .NET, Visual Studio and Build Tools for Visual Studio
| Risk | Medium |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2025-26646 |
| CWE-ID | CWE-73 |
| Exploitation vector | Network |
| Public exploit | N/A |
| Vulnerable software |
.NET Other software / Other software solutions Build Tools for Visual Studio Other software / Other software solutions .NET for Linux Universal components / Libraries / Software for developers .NET for macOS Universal components / Libraries / Software for developers Visual Studio Universal components / Libraries / Software for developers |
| Vendor | Microsoft |
Security Bulletin
This security bulletin contains one medium risk vulnerability.
1) External Control of File Name or Path
EUVDB-ID: #VU109148
Risk: Medium
CVSSv4.0: 5.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2025-26646
CWE-ID:
CWE-73 - External Control of File Name or Path
Exploit availability: No
DescriptionThe vulnerability allows a remote attacker to compromise th target system.
The vulnerability exists due to external control of file name or path in .NET, Visual Studio and Build Tools for Visual Studio. A remote user can perform spoofing attack on the system.
MitigationInstall updates from vendor's website.
Vulnerable software versions.NET: 8.0.0 - 9.0.4
.NET for Linux: 8.0.0 - 9.0.1 9.0.1
.NET for macOS: 8.0.0 - 9.0.1 9.0.1
Visual Studio: 17.8.0 17.8.34309.116 - 17.13.6 17.13.6
Build Tools for Visual Studio: All versions
CPE2.3- cpe:2.3:a:microsoft:.net:8.0.0:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:.net:8.0.1:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:.net:8.0.2:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:.net:8.0.3:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:.net:8.0.4:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:.net:8.0.5:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:.net:8.0.6:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:.net:8.0.7:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:.net:8.0.8:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:.net:8.0.10:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:_net_for_linux:8.0.0:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:_net_for_macos:8.0.0:*:*:*:*:*:*:*
- cpe:2.3:a:microsoft:visual_studio:17.8.0:17.8.34309.116:*:*:*:*:*:*
- cpe:2.3:a:microsoft:build_tools_for_visual_studio:*:*:*:*:*:*:*:*
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2025-26646
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
