PatchSiren cyber security CVE debrief

CVE-2026-0269 Palo Alto Networks CVE debrief

CVE-2026-0269 is a memory corruption vulnerability in Palo Alto Networks PAN-OS software. An authenticated user can initiate system reboots using a maliciously crafted packet. Repeated attempts to initiate a reboot causes the firewall to enter maintenance mode. This vulnerability has a CVSS score of 4.6 and is classified as MEDIUM severity. Panorama, Cloud NGFW, and Prisma Access are not impacted by this vulnerability.

Vendor: Palo Alto Networks
Product: Cloud NGFW
CVSS: MEDIUM 4.6
CISA KEV: Not listed in stored evidence
Original CVE published: 2026-06-10
Original CVE updated: 2026-06-11
Advisory published: 2026-06-10
Advisory updated: 2026-06-11

Who should care

Users of Palo Alto Networks PAN-OS software should be aware of this vulnerability and take necessary precautions to prevent exploitation.

Technical summary

A memory corruption vulnerability in the processing of tunnel traffic in Palo Alto Networks PAN-OS software allows an authenticated user to initiate system reboots using a maliciously crafted packet. Repeated attempts to initiate a reboot causes the firewall to enter maintenance mode.

Defensive priority

MEDIUM

Recommended defensive actions

Apply patches or updates provided by Palo Alto Networks to fix the vulnerability.
Restrict access to the affected systems to prevent authenticated users from exploiting the vulnerability.
Monitor system logs for suspicious activity.

Evidence notes

The CVE record was published on 2026-06-10T22:16:53.573Z and modified on 2026-06-11T15:21:30.653Z. The vulnerability has a CVSS score of 4.6 and is classified as MEDIUM severity.

Official resources

CVE-2026-0269 was published on 2026-06-10T22:16:53.573Z and modified on 2026-06-11T15:21:30.653Z.