What’s Vulnerable › Vulnerabilities
CVE-2026-45491: .NET Tampering Vulnerability
- Severity: medium (CVSS 5.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.4% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-06-09 · updated 2026-09-24
- Weakness: CWE-59
Description
Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.
Affected products
- Microsoft .NET: from 8.0.0 before 8.0.28; from 9.0.0 before 9.0.17; from 10.0.0 before 10.0.9 — fixed in 10.0.9, 8.0.28, 9.0.17
- Microsoft .NET: from 10.0.0 before 10.0.9 — fixed in 10.0.9
- Microsoft .NET 8.0: from 8.0 before 8.0.28 — fixed in 8.0.28
- Microsoft .NET 9.0: from 9.0.0 before 9.0.17 — fixed in 9.0.17
How to fix
Upgrade to a fixed version: Microsoft .NET 10.0.9, 8.0.28, 9.0.17; Microsoft .NET 10.0.9; Microsoft .NET 8.0 8.0.28; Microsoft .NET 9.0 9.0.17. Check the vendor advisory for mitigations.
References
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