.NET
CVE-2025-21171 — .NET Remote Code Execution Vulnerability
Executive Summary
None
Overview
7.5
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
High
PRIVILEGES REQUIRED
None
USER INTERACTION
Required
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.5
EPSS Score
0.01698
probability of exploitation in the next 30 days
0.75143 percentile - updated 2026-08-14
View on FIRST.org
Affected Products
10 affected products
| Product | KB Article | Severity | Impact | Restart Required |
|---|---|---|---|---|
| .NET 9.0 installed on Linux | 5050526 (Security Update) |
Important | Remote Code Execution | Maybe |
| .NET 9.0 installed on Mac OS | 5050526 (Security Update) |
Important | Remote Code Execution | Maybe |
| .NET 9.0 installed on Windows | 5050526 (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Visual Studio 2022 version 17.10 | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Visual Studio 2022 version 17.12 | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Visual Studio 2022 version 17.6 | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
| Microsoft Visual Studio 2022 version 17.8 | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
| PowerShell 7.5 installed on Linux | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
| PowerShell 7.5 installed on MacOS | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
| PowerShell 7.5 installed on Windows | Release Notes (Security Update) |
Important | Remote Code Execution | Maybe |
Patches
2 patches
| Article | Type | Restart |
|---|---|---|
5050526 |
Security Update | Maybe |
Release Notes |
Security Update | Maybe |
Exploits & PoC
No public exploit or PoC has been linked for this CVE yet. When available, references are sourced from public repositories and may be unverified or non-functional — review carefully before use.
Detection Rules
No public Sigma or Nuclei detection rule has been mapped to this CVE yet. Coverage is concentrated on exploited / high-profile vulnerabilities; check SigmaHQ for updates.
Acknowledgments
None
References
On This Page