CVE-2026-0265: PAN-OS: Authentication Bypass with Cloud Authentication Service (CAS) enabled

Severity: high (CVSS 8.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-13 · updated 2026-10-26
Weakness: CWE-347

Description

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.

Affected products

Palo Alto Networks PAN-OS: before 10.2.7; from 10.2.8 before 10.2.10; from 10.2.11 before 10.2.13; from 10.2.14 before 10.2.16; from 11.1.0 before 11.1.4; from 11.1.5 before 11.1.6 — fixed in 10.2.7, 10.2.10, 10.2.13, 10.2.16, 11.1.4, 11.1.6
Siemens Ruggedcom Ape1808 Firmware: all versions

How to fix

Upgrade to a fixed version: Palo Alto Networks PAN-OS 10.2.7, 10.2.10, 10.2.13, 10.2.16. Check the vendor advisory for mitigations.

References

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