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CVE-2026-45491

MEDIUM 6.2

Published 2026-06-09 · Last modified 2026-07-01

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

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.4%chance of exploitation in 30 days · 31st percentile

○ In CISA KEV ○ Public exploit / PoC

Impact if exploited

6.2CVSS 3.1 · MEDIUM

  • ConfidentialityNone
  • IntegrityHigh
  • AvailabilityNone

What an attacker needs

  • Access: Requires local access to the host
  • Privileges: No account or privileges required
  • User interaction: No user interaction needed
  • Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Affected

Vendors Microsoft

Products .Net 10.0 .Net 8.0 .Net 9.0

Weakness (CWE)

  • CWE-59

CVSS vector

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

References

Sources: NVD · CVE.org · EPSS