Vulnerability · Published Feb 11, 2026 · Assigned by palo_alto
CVE-2026-0228PAN-OS: Improper Validation of Terminal Server Agent Certificate
Low 1.3
In plain English
A low-severity improper certificate validation in Cloud NGFW from Palo Alto Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 10% of all known vulnerabilities).
Severity (CVSS 4.0)1.3Low
Exploit odds (30 days)0.2%top 89.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An improper certificate validation vulnerability in PAN-OS allows users to connect Terminal Server Agents on Windows to PAN-OS using expired certificates even if the PAN-OS configuration would not normally permit them to do so.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Palo Alto Networks | Cloud NGFW | see references |
| Palo Alto Networks | PAN-OS | 11.2.0 – before 11.2.811.1.0 – before 11.1.1110.2.0 – before 10.2.17 |
| Palo Alto Networks | Prisma Access | 10.2.0 – before 10.2.10-h28 |
Weakness: CWE-295 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:L/SI:N/SA:N/E:U/AU:N/R:U/V:D/RE:M/U:Amber
References
- https://security.paloaltonetworks.com/CVE-2026-0228 vendor-advisory