Authentication Bypass in Palo Alto PAN-OS LSVPN

Detection Guidance

Detection of this vulnerability involves monitoring for unauthorized site-to-site VPN connections that bypass authentication in the Large Scale VPN (LSVPN) functionality of Palo Alto Networks PAN-OS software.

A temporary mitigation includes enabling Threat ID 510032 in the Threat Prevention subscription, which may help detect some exploitation attempts, although coverage is limited.

Specific commands to detect this vulnerability are not provided in the available resources.

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Mitigation Strategies

Immediate mitigation steps include upgrading affected PAN-OS versions (10.2, 11.1, 11.2, and 12.1) to the patched releases provided by Palo Alto Networks.

As a temporary measure, enable Threat ID 510032 in the Threat Prevention subscription to provide limited detection and mitigation coverage against exploitation attempts.

Additionally, restrict access to the management interface from external IP addresses to reduce the risk of exploitation.

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Executive Summary

CVE-2026-0283 is an authentication bypass vulnerability in the Large Scale VPN (LSVPN) functionality of Palo Alto Networks PAN-OS software.

This flaw allows an attacker who has network access to bypass security restrictions and establish an unauthorized site-to-site VPN connection.

The vulnerability affects specific versions of PAN-OS 10.2, 11.1, 11.2, and 12.1, but does not impact Panorama, Cloud NGFW, or Prisma Access.

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Impact Analysis

This vulnerability can allow an attacker to bypass authentication and security restrictions to establish an unauthorized site-to-site VPN connection.

Such unauthorized VPN connections could potentially expose internal network resources to attackers, increasing the risk of data breaches or unauthorized access.

The risk is higher if the management interface of the affected PAN-OS device is accessible from external IP addresses.

Users are advised to upgrade to patched versions to mitigate this risk, or apply a temporary mitigation by enabling Threat ID 510032 in the Threat Prevention subscription, although this offers limited coverage.

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Compliance Impact

The provided information does not specify how this authentication bypass vulnerability in Palo Alto Networks PAN-OS Large Scale VPN (LSVPN) functionality affects compliance with common standards and regulations such as GDPR or HIPAA.

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