CVE-2026-45491
MEDIUMCVSS 5.5/10EPSS 0.39%
Last modified
CVE-2026-45491 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
Description
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Microsoft | .Net | >= 8.0.0, < 8.0.28 |
| Microsoft | .Net | >= 9.0.0, < 9.0.17 |
| Microsoft | .Net | >= 10.0.0, < 10.0.9 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-45491?
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
How severe is CVE-2026-45491?
CVE-2026-45491 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.
How do I fix CVE-2026-45491?
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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Are you affected by CVE-2026-45491?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST