Missing Authentication for Critical Function in Palo Alto PAN-OS - CVE-2026-0283
Published: July 10, 2026
Vulnerability identifier: #VU137306
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-0283
CWE-ID: CWE-306
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Palo Alto Networks, Inc.
Affected software:
Palo Alto PAN-OS
Palo Alto PAN-OS
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass security restrictions and establish an unauthorized site-to-site VPN connection.
The vulnerability exists due to missing authentication for a critical function in the large scale vpn (lsvpn) functionality when handling network access to configured satellite connections. A remote attacker can send crafted connection attempts to bypass security restrictions and establish an unauthorized site-to-site VPN connection.
Only firewalls using large scale vpn (lsvpn) with configured satellites are vulnerable.
How to mitigate CVE-2026-0283
Install security update from vendor's website.