CVE-2026-0265: CWE-347 Improper Verification of Cryptographic Signature in Palo Alto Networks Cloud NGFW
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.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-0265) involves improper verification of cryptographic signatures (CWE-347) in Palo Alto Networks PAN-OS software. It allows an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled, particularly on the management interface. The issue affects PA-Series and VM-Series firewalls and Panorama (virtual and M-Series) but does not impact Cloud NGFW or Prisma Access. The risk is mitigated by restricting management interface access to trusted internal IPs as per Palo Alto Networks' best practices.
Potential Impact
An unauthenticated attacker with network access can bypass authentication controls on affected PAN-OS devices with CAS enabled, potentially gaining unauthorized access. The risk is higher if CAS is enabled on the management interface. This could lead to unauthorized device management or configuration changes. Cloud NGFW and Prisma Access are not impacted by this vulnerability.
Mitigation Recommendations
No official patch or fix status is provided. Patch status is not yet confirmed — check the Palo Alto Networks vendor advisory for current remediation guidance. Meanwhile, risk can be greatly reduced by restricting access to the management web interface to trusted internal IP addresses following Palo Alto Networks' recommended best practice deployment guidelines.
CVE-2026-0265: CWE-347 Improper Verification of Cryptographic Signature in Palo Alto Networks Cloud NGFW
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.
CVSS v4.0
Score 7.2high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-0265) involves improper verification of cryptographic signatures (CWE-347) in Palo Alto Networks PAN-OS software. It allows an unauthenticated attacker with network access to bypass authentication controls when Cloud Authentication Service (CAS) is enabled, particularly on the management interface. The issue affects PA-Series and VM-Series firewalls and Panorama (virtual and M-Series) but does not impact Cloud NGFW or Prisma Access. The risk is mitigated by restricting management interface access to trusted internal IPs as per Palo Alto Networks' best practices.
Potential Impact
An unauthenticated attacker with network access can bypass authentication controls on affected PAN-OS devices with CAS enabled, potentially gaining unauthorized access. The risk is higher if CAS is enabled on the management interface. This could lead to unauthorized device management or configuration changes. Cloud NGFW and Prisma Access are not impacted by this vulnerability.
Mitigation Recommendations
No official patch or fix status is provided. Patch status is not yet confirmed — check the Palo Alto Networks vendor advisory for current remediation guidance. Meanwhile, risk can be greatly reduced by restricting access to the management web interface to trusted internal IP addresses following Palo Alto Networks' recommended best practice deployment guidelines.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- palo_alto
- Date Reserved
- 2025-11-03T20:44:25.538Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a04ba1fcbff5d8610f4824d
Added to database: 05/13/2026, 17:51:27 UTC
Last enriched: 07/15/2026, 11:21:30 UTC
Last updated: 07/31/2026, 19:22:57 UTC
Views: 78
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