Out-of-bounds write in Palo Alto PAN-OS - CVE-2026-0288
Published: July 10, 2026
Vulnerability identifier: #VU137301
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-0288
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service or execute arbitrary code.
The vulnerability exists due to out-of-bounds write in the User-ID Terminal Server Agent (TSA) component when handling network traffic. A remote attacker can send specially crafted network traffic to cause a denial of service or execute arbitrary code.
This issue only affects devices with at least one Terminal Server Agent entry configured. Panorama is not impacted.
Affected software
Palo Alto PAN-OS
How to mitigate CVE-2026-0288
Install security update from vendor's website.
Palo Alto PAN-OS - addressed in versions 10.2.7-h36, 10.2.10-h39, 10.2.13-h23, 10.2.16-h9, 10.2.18-h8, 11.1.4-h35, 11.1.6-h35, 11.1.7-h8, 11.1.10-h30, 11.1.13-h9, 11.1.16, 11.2.4-h20, 11.2.7-h18, 11.2.10-h12, 11.2.13, 12.1.4-h8, 12.1.7-h2, 12.1.8