Out-of-bounds write in Palo Alto PAN-OS - CVE-2026-0263
Published: May 19, 2026
Vulnerability identifier: #VU131773
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-0263
CWE-ID: CWE-787
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 execute arbitrary code.
The vulnerability exists due to out-of-bounds write in IKEv2 processing when processing IKEv2 traffic. A remote attacker can send specially crafted IKEv2 packets to execute arbitrary code.
Exploitation requires IKEv2 VPN tunnels configured with Post Quantum Cryptography (PQC).
How to mitigate CVE-2026-0263
Install security update from vendor's website.