CVE-2026-0269 PUBLISHED

PAN-OS: Denial of Service (DoS) in Tunnel Traffic Processing

Assigner: palo_alto
Reserved: 03.11.2025 Published: 10.06.2026 Updated: 11.06.2026

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.

Panorama, Cloud NGFW, and Prisma® Access are not impacted by this vulnerability.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/AU:N/R:A/V:D/RE:M/U:Amber
CVSS Score: 4.6

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Adjacent	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	None	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Palo Alto Networks
Product	Cloud NGFW
Versions	Default: unaffected Version All is unaffected

Vendor	Palo Alto Networks
Product	PAN-OS
Versions	Default: unaffected affected from 12.1.0 to 12.1.5 (excl.) affected from 11.2.0 to 11.2.10 (excl.) affected from 11.1.0 to 11.1.6-h21 (excl.) affected from 10.2.0 to 10.2.16-h6 (excl.)

Vendor	Palo Alto Networks
Product	Panorama
Versions	Default: unaffected Version All is unaffected

Vendor	Palo Alto Networks
Product	Prisma Access
Versions	Default: unaffected Version All is unaffected

Affected Configurations

This vulnerability affects PAN-OS firewalls configured with one or more of the following:

IPSec Tunnels
GlobalProtect Gateways (Remote Access)

Exploits

Palo Alto Networks is not aware of any malicious exploitation of this issue.

References

https://security.paloaltonetworks.com/CVE-2026-0269

Problem Types

CWE-754: Improper Check for Unusual or Exceptional Conditions CWE

Impacts

CAPEC-153 Input Data Manipulation