1. Home
  2. CVE Database
  3. CVE-2026-0263
CRITICAL · 9.8

CVE-2026-0263

A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS® software allows an unauthenticated network-based attacker to execute arbitrary code with elevated privileges on th...

Vulnerability Description

A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS® software allows an unauthenticated network-based attacker to execute arbitrary code with elevated privileges on the firewall, or cause a denial of service (DoS) condition. Panorama, Cloud NGFW, and Prisma® Access are not impacted by these vulnerabilities.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
PaloaltonetworksPan-Os>= 11.1.0, < 11.1.4

Related Weaknesses (CWE)

CWE-787

References

FAQ

What is CVE-2026-0263?

CVE-2026-0263 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A buffer overflow vulnerability in the IKEv2 processing of Palo Alto Networks PAN-OS® software allows an unauthenticated network-based attacker to execute arbitrary code with elevated privileges on th...

How severe is CVE-2026-0263?

CVE-2026-0263 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-0263?

Check the references section above for vendor advisories and patch information. Affected products include: Paloaltonetworks Pan-Os.