An authentication bypass vulnerability in Palo Alto Networks PAN-OS® software enables an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled. The risk is higher if CAS is enabled on the management interface and lower when any other login interfaces are used. The risk of this issue is greatly reduced if you secure access to the management web interface by restricting access to only trusted internal IP addresses according to our recommended best practice deployment guidelines https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 . This issue is applicable to PAN-OS software on PA-Series and VM-Series firewalls and on Panorama (virtual and M-Series). Cloud NGFW and Prisma Access® are not impacted by this vulnerability.
[POC] CVE-2026-0265 — CVE-2026-0265-check
Safely detect whether a PAN-OS target is vulnerable to CVE-2026-0265.
[POC] CVE-2026-0265 — palo-alto-cve-2026-0265-checker
Python script to sweep a fleet of Palo Alto firewalls and Panoramas via SSH, check PAN-OS version against CVE-2026-0265 (Authentication Bypass via Cloud Authentication Service), detect whether CAS is actually configured, and report exploitability in a color-coded summary table.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
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