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CVE-2026-0265 Palo Alto Networks CVE debrief

CVE-2026-0265 is an authentication bypass vulnerability in Palo Alto Networks PAN-OS software. This issue 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 best practice deployment guidelines [ref-4]. 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.

Vendor
Palo Alto Networks
Product
Cloud NGFW
CVSS
CRITICAL 9.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-05-12
Original CVE updated
2026-07-02
Advisory published
2026-05-12
Advisory updated
2026-07-02

Who should care

Administrators and security teams responsible for Palo Alto Networks PAN-OS software, specifically those using PA-Series and VM-Series firewalls and Panorama (virtual and M-Series) with Cloud Authentication Service (CAS) enabled.

Technical summary

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. This issue has a CVSS score of 7.2 and is classified as HIGH severity.

Defensive priority

High

Recommended defensive actions

  • Restrict access to the management web interface to only trusted internal IP addresses according to best practice deployment guidelines [ref-4].
  • Review and update PAN-OS software configurations to ensure secure authentication mechanisms are in place.

Evidence notes

Vendor identified as Palo Alto Networks based on evidence from source references [ref-4].

Sources and references

Verified primary and authoritative sources

  • CVE-2026-0265 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-0265

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-0265 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-0265

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Source reference

    Unverified legacy reference

    URL: https://security.paloaltonetworks.com/CVE-2026-0265

    [email protected]

  • Source reference

    Unverified legacy reference

    URL: https://cert-portal.siemens.com/productcert/html/ssa-967325.html

    0b142b55-0307-4c5a-b3c9-f314f3fb7c5e

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.