What is CVE-2026-0233?

CVE-2026-0233 is a high-severity vulnerability in Microsoft Windows, classified under Improper Certificate Validation. CVSS score: 8.8/10. Published 2026-04-13.

How severe is CVE-2026-0233?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Microsoft Windows

CVE-2026-0233

A certificate validation vulnerability in Palo Alto Networks Autonomous Digital Experience Manager on Windows allows an unauthenticated attacker with adjacent network access to execute arbitrary code with NT AUTHORITY\SYSTEM privileges.

Vulnerability class: Improper Certificate Validation

EPSS: 0.002 (7.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Microsoft Windows
Palo Alto Networks Autonomous Digital Experience Manager — versions 5.10.0
Paloaltonetworks Autonomous_digital_experience_manager

Weakness classification (CWE)

CWE-295 — Improper Certificate Validation

References

psirt@paloaltonetworks.com (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2026-0233?: CVE-2026-0233 is a high-severity vulnerability in Microsoft Windows, classified under Improper Certificate Validation. CVSS score: 8.8/10. Published 2026-04-13.
How severe is CVE-2026-0233?: High severity. CVSS v3 base score is 8.8 out of 10.