CVE-2021-26423
HIGHCVSS 7.5/10EPSS 3.86%
Last modified
CVE-2021-26423 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. .NET Core and Visual Studio Denial of Service Vulnerability. EPSS estimates a 3.86% chance of exploitation in the next 30 days.
Description
.NET Core and Visual Studio Denial of Service Vulnerability
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .Net | >= 5.0, <= 5.0.8 |
| Microsoft | .Net Core | >= 2.1, <= 2.1.28 |
| Microsoft | .Net Core | >= 3.1, <= 3.1.17 |
| Microsoft | Powershell Core | >= 7.0, < 7.0.7 |
| Microsoft | Powershell Core | >= 7.1, < 7.1.4 |
| Microsoft | Visual Studio 2017 | >= 15.0, <= 15.9 |
| Microsoft | Visual Studio 2019 | >= 16.0, <= 16.10 |
| Microsoft | Visual Studio 2019 | 8.10 |
References
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-26423?
.NET Core and Visual Studio Denial of Service Vulnerability
How severe is CVE-2021-26423?
CVE-2021-26423 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.86% probability of exploitation in the next 30 days.
How do I fix CVE-2021-26423?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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- CVE-2021-26428Azure Sphere Information Disclosure Vulnerability4.4
- CVE-2021-26429Azure Sphere Elevation of Privilege Vulnerability7.7
Are you affected by CVE-2021-26423?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST