CVE-2026-45491

Name: CVE-2026-45491
Creator: NVD / NIST
Published: 2026-06-09T17:17:25.567+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.39%

Last modified Jun 17, 2026

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

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.39%

30.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-59

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

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45491Vendor Advisory

Timeline

Published: Jun 9, 2026
Last Modified: Jun 17, 2026
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.

Are you affected by CVE-2026-45491?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST