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High

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

CVE-2026-0265 · PAN-OS · CVSS 8.1

In brief

Severity · CVSS
High8.1CVSS 3.1, High
EPSS
1%
CISA KEV
Not listed
Products
PAN-OS
Published · Modified
·
Last verified

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. 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.

Weakness: CWE-347

Title, description and the vendor's statements are quoted from the CVE record; a vendor's advisory is summarised in Patcharo's words, with a link.

Affected and fixed versions

Per product and release branch, as the vendor's CVE record and official advisory state them. A fixed release is shown only when a document names it: the vendor's, or CERT-FR's for Check Point, with its source.

4 branches with a published fixed release

Palo Alto Networks PAN-OS

Source: CVE-2026-0265

  1. 12.1
    Affected versions>= 12.1.0, < 12.1.4-h5>= 12.1.5, < 12.1.7
    First fixed release12.1.4-h512.1.7
  2. 11.2Approaching end of support
    Affected versions>= 11.2.0, < 11.2.4-h17>= 11.2.5, < 11.2.7-h13>= 11.2.8, < 11.2.10-h6>= 11.2.11, < 11.2.12
    First fixed release11.2.4-h1711.2.7-h1311.2.10-h611.2.12
  3. 11.1Approaching end of support
    Affected versions>= 11.1.0, < 11.1.4-h33>= 11.1.5, < 11.1.6-h32>= 11.1.7, < 11.1.7-h6>= 11.1.8, < 11.1.10-h25>= 11.1.11, < 11.1.13-h5>= 11.1.14, < 11.1.15
    First fixed release11.1.4-h3311.1.6-h3211.1.7-h611.1.10-h2511.1.13-h511.1.15
  4. 10.2End of life
    Affected versions>= 10.2.0, < 10.2.7-h34>= 10.2.8, < 10.2.10-h36>= 10.2.11, < 10.2.13-h21>= 10.2.14, < 10.2.16-h7>= 10.2.17, < 10.2.18-h6
    First fixed release10.2.7-h3410.2.10-h3610.2.13-h2110.2.16-h710.2.18-h6

Releases the vendor does not list are not affected.

Remediation

Fix available

Vendor fix

  • PAN-OS 12.112.1.4-h5, 12.1.7
  • PAN-OS 11.211.2.4-h17, 11.2.7-h13, 11.2.10-h6, 11.2.12
  • PAN-OS 11.111.1.4-h33, 11.1.6-h32, 11.1.7-h6, 11.1.10-h25, 11.1.13-h5, 11.1.15
  • PAN-OS 10.210.2.7-h34, 10.2.10-h36, 10.2.13-h21, 10.2.16-h7, 10.2.18-h6

Upgrade to a fixed release listed above for your branch, or to a later fixed release the vendor explicitly supports.

VERSION MINOR VERSION RANGE SUGGESTED SOLUTION Cloud NGFW No action needed. PAN-OS 12.1 12.1.5 through 12.1.6 Upgrade to 12.1.7 or later. 12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h5 or 12.1.7 or later. PAN-OS 11.2 11.2.11 or later Upgrade to 11.2.12 or later.

Full text

11.2.8 through 11.2.10-h* Upgrade to 11.2.10-h6 or 11.2.12 or later. 11.2.5 through 11.2.7-h* Upgrade to 11.2.7-h13 or 11.2.12 or later. 11.2.0 through 11.2.4-h* Upgrade to 11.2.4-h17 or 11.2.12 or later. PAN-OS 11.1 11.1.14 or later Upgrade to 11.1.15 or later. 11.1.11 through 11.1.13-h* Upgrade to 11.1.13-h5 or 11.1.15 or later. 11.1.8 through 11.1.10-h* Upgrade to 11.1.10-h25 or 11.1.15 or later. 11.1.7 through 11.1.7-h* Upgrade to 11.1.7-h6 or 11.1.15 or later. 11.1.5 through 11.1.6-h* Upgrade to 11.1.6-h32 or 11.1.15 or later. 11.1.0 through 11.1.4-h* Upgrade to 11.1.4-h33 or 11.1.15 or later. PAN-OS 10.2 10.2.17 through 10.…

SourcePalo Alto Networks (CVE record)

Mitigation (vendor)

The vast majority of firewalls already follow Palo Alto Networks' and industry best practices. However, if you haven’t already, we strongly recommend that you secure access to your management interface according to our best practice deployment guidelines.

Full text

Specifically, you should restrict access to the management interface to only trusted internal IP addresses to prevent external access from the internet. Review information about how to secure management access to your Palo Alto Networks firewalls: * Palo Alto Networks LIVEcommunity article: https://live.paloaltonetworks.com/t5/community-blogs/tips-amp-tricks-how-to-secure-the-management-access-of-your-palo/ba-p/464431 * Palo Alto Networks official and more detailed technical documentation: https://docs.paloaltonetworks.com/best-practices/10-1/administrative-access-best-practices/administrative-access-best-practices/deploy-administrativ…

SourcePalo Alto Networks (CVE record)

CERT-FR recommendation

Refer to the vendor's security bulletin to obtain patches (see Documentation section).

SourceCERTFR-2026-AVI-0596

Last verified 1 Oct 2026 at 09:32 UTC

Known exploitation

Not listed in CISA KEV as of the last check.

1% probability of exploitation in the next 30 days (percentile 63%).

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

CERT-FR

1 document of the French national CERT (ANSSI) references this CVE.

Advisory (AVI)CERTFR-2026-AVI-0596Published 15 May 2026

Multiple vulnerabilities in Palo Alto Networks products

Remote arbitrary code executionPrivilege escalationRemote denial of serviceData confidentiality breachData integrity breachSecurity policy bypassRemote cross-site scripting (XSS)Server-side request forgery (SSRF)SQL injection (SQLi)

Summary

Multiple vulnerabilities have been discovered in Palo Alto Networks products. Some of them allow an attacker to cause remote arbitrary code execution, privilege escalation, and remote denial of service.

Recommendation

Refer to the vendor's security bulletin to obtain patches (see Documentation section).

Official document on cert.ssi.gouv.frread by Patcharo 28 Sept 2026 at 20:03 UTCMachine translation of the French text published by CERT-FR; a text whose translation did not pass Patcharo's checks stays in French. Identifiers, versions and links are copied unchanged.

Timeline

  1. Published by the source
  2. Source record last modified
  3. EPSS score computed
  4. Last verified by Patcharo

Official sources

Vendor advisory

References

Palo Alto Networks · NVD · FIRST EPSS

How Patcharo reads this

Affected and fixed releases come from the vendor's structured statements and are matched against exact versions; CVSS from NVD, exploitation from CISA KEV and the vendor's own advisory, probability from FIRST EPSS. Missing data stays Unknown and never becomes Not affected.

Read the methodologyRead the guide: PAN-OS versions explained: release lines, maintenance releases and the -h1, -h2, -h3 suffixes

Related vulnerabilities

Other records affecting the same products, newest first.

  • CVE-2026-0301PAN-OS: Information Disclosure Vulnerability in URL FilteringHigh
  • CVE-2026-0280PAN-OS: IPv6 Firewall Policy BypassHigh
  • CVE-2026-0281PAN-OS: Information Disclosure Vulnerability in Management Web InterfaceHigh
  • CVE-2026-0283PAN-OS: Authentication Bypass Vulnerability in Large Scale VPN (LSVPN)High
  • CVE-2026-0284PAN-OS: XML Injection Vulnerability in Large Scale VPN (LSVPN)Critical

All PAN-OS vulnerabilitiesAll Palo Alto Networks vulnerabilities