Improper Certificate Validation in Palo Alto PAN-OS and Prisma Access - CVE-2026-0228

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Main Vulnerability Database Vulnerabilities #VU122749

Improper Certificate Validation in Palo Alto PAN-OS and Prisma Access - CVE-2026-0228

Published: February 12, 2026


Vulnerability identifier: #VU122749
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-0228
CWE-ID: CWE-295
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Palo Alto Networks, Inc.
Affected software:
Palo Alto PAN-OS
Prisma Access

Detailed vulnerability description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to improper certificate validation. A remote user can connect Terminal Server Agents on Windows to PAN-OS using expired certificates.


How to mitigate CVE-2026-0228

Install updates from vendor's website.

Sources