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Vulnerabilities

Vulnerability · CVE-2025-55247

Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.

Published Oct 14, 2025 · catalog updated Feb 22, 2026 · Microsoft .NET 8.0

Last checked Nov 1, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-55247. EPSS is 0.61%. Act only if a listed version of Microsoft .NET 8.0 is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High7.3
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.61%
Remediation
Version ranges on file
Affected products
vendor Microsoft .NET 8.0 8.0.0 <8.0.21

Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Microsoft .NET 8.0 8.0.0 <8.0.218.0.0 <8.0.21

How to fix CVE-2025-55247

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-55247. EPSS is 0.61%. Act only if a listed version of Microsoft .NET 8.0 is installed.

Which versions are affected?

Compare what you have installed with Microsoft .NET 8.0 8.0.0 <8.0.21 8.0.0 <8.0.21. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.61%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 14, 2025 · EUVD

    Detected

    Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.

  2. Feb 22, 2026 · EUVD

    Updated

    Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.

Sources

  • CVE.orgVulnerability recordCVE-2025-55247

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-55247

    30-day exploitation probability 0.61%

    first.org
  • EUVDVulnerability recordEUVD-2025-34427

    Improper link resolution before file access ('link following') in .NET allows an authorized attacker to elevate privileges locally.

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 1, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 23, 2026
  • FIRST EPSSOct 23, 2026
  • EUVDOct 23, 2026