ZDF
Sign inSign up

Vulnerabilities

Vulnerability · CVE-2026-45490

Improper authorization in .NET allows an authorized attacker to elevate privileges locally.

Published Jun 9, 2026 · catalog updated Nov 11, 2026 · Improper authorization in .NET

Last checked Nov 11, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-45490. EPSS is 0.38%. Act only if a listed version of Improper authorization in .NET is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Improper authorization in .NET).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High7.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.38%
Remediation
Version ranges on file
Affected products
cpe microsoft/.net

Improper authorization 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.

  • cpe microsoft/.net< 10.0.9
  • cpe microsoft/.net< 8.0.28
  • cpe microsoft/.net< 9.0.17

How to fix CVE-2026-45490

  • Upgrade

    CVE-2026-45490 lists a fix boundary at 10.0.9. Compare the installed build with that boundary before you change production.

  • Version check

    Affected < 10.0.9

  • Advisory

    Open the nvd record and follow its fix.

  • Official advisories

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-2026-45490. EPSS is 0.38%. Act only if a listed version of Improper authorization in .NET is installed.

Which versions are affected?

Compare what you have installed with < 10.0.9, < 8.0.28, < 9.0.17. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-266; CWE-285: Improper Authorization; CWE-863: Incorrect Authorization. EPSS 0.38%. 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. Jun 9, 2026 · NIST NVD

    Detected

    Improper authorization in .NET allows an authorized attacker to elevate privileges locally.

  2. Nov 11, 2026 · NIST NVD

    Updated

    Improper authorization in .NET allows an authorized attacker to elevate privileges locally.

Sources

  • NIST NVDVulnerability recordCVE-2026-45490

    Improper authorization in .NET allows an authorized attacker to elevate privileges locally.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Nov 11, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • NIST NVDNov 11, 2026