SB2026021223 - Improper Certificate Validation in Palo Alto PAN-OS
Published: February 12, 2026
Security Bulletin ID
SB2026021223
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Improper Certificate Validation (CVE-ID: CVE-2026-0228)
CWE-ID: CWE-295 - Improper Certificate Validation
CVSSv4: 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
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.
Remediation
Install update from vendor's website.