Net
CVE-2025-21172
HIGH
Vulnerability Assessment
| Weakness |
CWE
OWASP Top 10:2025
A06:2021 - Vulnerable and Outdated Components
ASVS 5.0
V15 - Secure Coding and Architecture Heap buffer bounds checking
MITRE ATT&CK
1 technique across 1 tactic: Execution The technique list with ATT&CK links and the kill-chain view is part of the Basic plan and up. |
| Impact | CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, high complexity, no privileges required, user interaction required. EPSS exploitation probability: 0.43%. |
| Exploit ScenarioDerived | This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system. |
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Alert meAnalysisAIv1 – Mar 28, 2026
.NET and Visual Studio Remote Code Execution Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.
RemediationAI
No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.
Affected Packages
Source: OSV (Open Source Vulnerabilities)
Affects your stack
Affects 12 packages in nuget
Checking this CVE against your own stacks and servers is part of the Basic plan and up.
Technical ContextAI · show details
This vulnerability is classified under CWE-122. Affected products include: Microsoft .Net, Microsoft Visual Studio 2017, Microsoft Visual Studio 2019, Microsoft Visual Studio 2022.
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Severity by source
AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
.NET and Visual Studio Remote Code Execution Vulnerability
Executive ViewAI
CVE-2025-21172 presents notable security risk, a heap-based buffer overflow vulnerability rated CVSS 7.5. Exploitation could allow attackers to corrupt memory, crash the application, or potentially execute arbitrary code. Organizations should apply vendor updates when available and consider compensating controls in the interim.
Apply vendor patch. If immediate patching is not feasible: (1) Enable ASLR and DEP where available; (2) Implement network segmentation; (3) Monitor for exploitation indicators.
Threat Intelligence Overview
How this decision was reached
The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.
What every action level means
SSVC AssessmentENISA
Priority Score
Attack Technique
A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.
A heap overflow occurs when a program writes data beyond the bounds of a buffer allocated in the heap memory region.
Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.
Affected Products (CPE)CVE.org
Denial of service against HTTP/2 server implementations allows remote unauthenticated attackers to exhaust server resour
Remote code execution is possible in Node.js releases that bundle a vulnerable Brotli decoder: a malformed brotli-compre
.NET and Visual Studio Denial of Service Vulnerability. Rated high severity (CVSS 7.5), this vulnerability is remotely e
Heap-based buffer overflow (CWE-122) in Microsoft .NET and Visual Studio allows a network-based unauthenticated attacker
Heap-based buffer overflow in Microsoft Visual Studio 2022 and 2026 enables network-delivered remote code execution when
Privilege escalation in Microsoft .NET runtimes (8.0, 9.0, and 10.0) and Microsoft Visual Studio 2022 and 2026 results f
Heap-based buffer overflow (CWE-122) in Microsoft .NET enables local code execution across all actively supported .NET r
Local code execution via out-of-bounds write in Microsoft .NET allows an unauthenticated local attacker to achieve full
Local privilege escalation in Microsoft .NET (versions 8.0, 9.0, and 10.0) and Microsoft Visual Studio 2022/2026 allows
Denial-of-service in Microsoft .NET runtimes and Visual Studio allows unauthenticated remote attackers to crash or hang
Integer overflow in Microsoft .NET Framework and modern .NET runtimes enables local code execution with full process com
Use-after-free memory corruption in Microsoft's QUIC protocol implementation (MsQuic) exposes sensitive heap memory to u
Same weakness CWE-122 – Heap-based Buffer Overflow
View allVendor StatusVendor
SUSE
Severity: High| Product | Status |
|---|---|
| SUSE Liberty Linux 8 | Fixed |
GitHub PoC
Exploit-DB