CVE-2026-0228

PAN-OS: Improper Validation of Terminal Server Agent Certificate

CVSS 1.3 LOWEPSS 0.2%CWE-295

Vexday Risk Score

8Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 1.3EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado

Lifecycle

11 Feb 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

Palo Alto Networks · Cloud NGFW Palo Alto Networks · PAN-OS Palo Alto Networks · Prisma Access

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References

https://security.paloaltonetworks.com/CVE-2026-0228