CVE-2026-45491

.NET Tampering Vulnerability

State: Published
Severity: 6.2 Medium
Published: Jun 9, 2026
Updated: Sep 24, 2026
Reserved: May 12, 2026

Description

Improper link resolution before file access ('link following') in .NET allows an unauthorized attacker to perform tampering locally.

Scores

CVSS	Score	Vector	Source
3.1	6.2 Medium	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C	microsoft

Weaknesses

CWE-59 Improper Link Resolution Before File Access ('Link Following')

Affected Products

Product	Versions
.NET 10.0Microsoft	10.0.0 to before 10.0.9Affected
.NET 8.0Microsoft	8.0 to before 8.0.28Affected
.NET 8.0Microsoft	8.0.0 to before 8.0.28Affected
.NET 9.0Microsoft	9.0.0 to before 9.0.17Affected

References

.NET Tampering Vulnerabilityvendor-advisorypatch

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