CVE-2026-0263: PAN-OS: Remote Code Execution (RCE) in IKEv2 Processing

Published May 13, 2026
·
Updated

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.

Affected Software

106 affected componentsFixes available
Palo Alto Networks PAN-OS
Palo Alto Networks Cloud NGFW
Palo Alto Networks PAN-OS=12.1.0, =11.2.0, =11.1.0
12.1.712.1.4-h511.2.1211.2.10-h611.2.7-h1311.2.4-h1711.1.1511.1.13-h511.1.10-h2511.1.7-h611.1.6-h3211.1.4-h33
Palo Alto Networks Prisma Access
Palo Alto Networks PAN-OS>=11.1.0<11.1.4
Palo Alto Networks PAN-OS>=11.1.5<11.1.6
Palo Alto Networks PAN-OS>=11.1.8<11.1.10
Palo Alto Networks PAN-OS>=11.1.11<11.1.13
Palo Alto Networks PAN-OS=11.1.4
Palo Alto Networks PAN-OS=11.1.4-h1
Palo Alto Networks PAN-OS=11.1.4-h10
Palo Alto Networks PAN-OS=11.1.4-h11
Palo Alto Networks PAN-OS=11.1.4-h12
Palo Alto Networks PAN-OS=11.1.4-h13
Palo Alto Networks PAN-OS=11.1.4-h15
Palo Alto Networks PAN-OS=11.1.4-h16
Palo Alto Networks PAN-OS=11.1.4-h17
Palo Alto Networks PAN-OS=11.1.4-h18
Palo Alto Networks PAN-OS=11.1.4-h2
Palo Alto Networks PAN-OS=11.1.4-h25
Palo Alto Networks PAN-OS=11.1.4-h27
Palo Alto Networks PAN-OS=11.1.4-h3
Palo Alto Networks PAN-OS=11.1.4-h32
Palo Alto Networks PAN-OS=11.1.4-h4
Palo Alto Networks PAN-OS=11.1.4-h5
Palo Alto Networks PAN-OS=11.1.4-h6
Palo Alto Networks PAN-OS=11.1.4-h7
Palo Alto Networks PAN-OS=11.1.4-h8
Palo Alto Networks PAN-OS=11.1.4-h9
Palo Alto Networks PAN-OS=11.1.6
Palo Alto Networks PAN-OS=11.1.6-h1
Palo Alto Networks PAN-OS=11.1.6-h10
Palo Alto Networks PAN-OS=11.1.6-h14
Palo Alto Networks PAN-OS=11.1.6-h17
Palo Alto Networks PAN-OS=11.1.6-h18
Palo Alto Networks PAN-OS=11.1.6-h19
Palo Alto Networks PAN-OS=11.1.6-h2
Palo Alto Networks PAN-OS=11.1.6-h20
Palo Alto Networks PAN-OS=11.1.6-h21
Palo Alto Networks PAN-OS=11.1.6-h22
Palo Alto Networks PAN-OS=11.1.6-h23
Palo Alto Networks PAN-OS=11.1.6-h25
Palo Alto Networks PAN-OS=11.1.6-h29
Palo Alto Networks PAN-OS=11.1.6-h3
Palo Alto Networks PAN-OS=11.1.6-h4
Palo Alto Networks PAN-OS=11.1.6-h5
Palo Alto Networks PAN-OS=11.1.6-h6
Palo Alto Networks PAN-OS=11.1.6-h7
Palo Alto Networks PAN-OS=11.1.7
Palo Alto Networks PAN-OS=11.1.7-h1
Palo Alto Networks PAN-OS=11.1.7-h2
Palo Alto Networks PAN-OS=11.1.7-h4
Palo Alto Networks PAN-OS=11.1.10
Palo Alto Networks PAN-OS=11.1.10-h1
Palo Alto Networks PAN-OS=11.1.10-h10
Palo Alto Networks PAN-OS=11.1.10-h12
Palo Alto Networks PAN-OS=11.1.10-h21
Palo Alto Networks PAN-OS=11.1.10-h4
Palo Alto Networks PAN-OS=11.1.10-h5
Palo Alto Networks PAN-OS=11.1.10-h7
Palo Alto Networks PAN-OS=11.1.10-h9
Palo Alto Networks PAN-OS=11.1.13
Palo Alto Networks PAN-OS=11.1.13-h1
Palo Alto Networks PAN-OS=11.1.13-h2
Palo Alto Networks PAN-OS=11.1.13-h3
Palo Alto Networks PAN-OS=11.1.14
Palo Alto Networks PAN-OS>=11.2.0<11.2.4
Palo Alto Networks PAN-OS>=11.2.5<11.2.7
Palo Alto Networks PAN-OS>=11.2.8<11.2.10
Palo Alto Networks PAN-OS=11.2.4
Palo Alto Networks PAN-OS=11.2.4-h1
Palo Alto Networks PAN-OS=11.2.4-h10
Palo Alto Networks PAN-OS=11.2.4-h11
Palo Alto Networks PAN-OS=11.2.4-h12
Palo Alto Networks PAN-OS=11.2.4-h14
Palo Alto Networks PAN-OS=11.2.4-h15
Palo Alto Networks PAN-OS=11.2.4-h2
Palo Alto Networks PAN-OS=11.2.4-h3
Palo Alto Networks PAN-OS=11.2.4-h4
Palo Alto Networks PAN-OS=11.2.4-h5
Palo Alto Networks PAN-OS=11.2.4-h6
Palo Alto Networks PAN-OS=11.2.4-h7
Palo Alto Networks PAN-OS=11.2.4-h8
Palo Alto Networks PAN-OS=11.2.4-h9
Palo Alto Networks PAN-OS=11.2.7
Palo Alto Networks PAN-OS=11.2.7-h1
Palo Alto Networks PAN-OS=11.2.7-h10
Palo Alto Networks PAN-OS=11.2.7-h11
Palo Alto Networks PAN-OS=11.2.7-h12
Palo Alto Networks PAN-OS=11.2.7-h2
Palo Alto Networks PAN-OS=11.2.7-h3
Palo Alto Networks PAN-OS=11.2.7-h4
Palo Alto Networks PAN-OS=11.2.7-h7
Palo Alto Networks PAN-OS=11.2.7-h8
Palo Alto Networks PAN-OS=11.2.10
Palo Alto Networks PAN-OS=11.2.10-h1
Palo Alto Networks PAN-OS=11.2.10-h2
Palo Alto Networks PAN-OS=11.2.10-h3
Palo Alto Networks PAN-OS=11.2.10-h4
Palo Alto Networks PAN-OS=11.2.10-h5
Palo Alto Networks PAN-OS=11.2.11
Palo Alto Networks PAN-OS>=12.1.0<12.1.4
Palo Alto Networks PAN-OS>=12.1.5<12.1.7
Palo Alto Networks PAN-OS=12.1.4
Palo Alto Networks PAN-OS=12.1.4-h2
Palo Alto Networks PAN-OS=12.1.4-h3

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Fixed in 12.1.7Fixed in 12.1.4-h5Fixed in 11.2.12Fixed in 11.2.10-h6Fixed in 11.2.7-h13Fixed in 11.2.4-h17Fixed in 11.1.15Fixed in 11.1.13-h5Fixed in 11.1.10-h25Fixed in 11.1.7-h6Fixed in 11.1.6-h32Fixed in 11.1.4-h33
  2. Upgrade

    Upgrade Palo Alto Networks PAN-OS 11.1 to a version that resolves this vulnerability.

    Fixed in 11.1.15
  3. Upgrade

    Upgrade Palo Alto Networks PAN-OS 11.2 to a version that resolves this vulnerability.

    Fixed in 11.2.12
  4. Upgrade

    Upgrade Palo Alto Networks PAN-OS 12.1 to a version that resolves this vulnerability.

    Fixed in 12.1.7
  5. Compensating control

    For customers using IKEv2 VPN, mitigate by configuring IKEv2 VPN tunnels only with NIST approved Post Quantum Cryptography (PQC) ciphers.

Event History

May 13, 2026
Advisory Published
via Palo Alto Networks·04:00 PM
Data Sourced
via Palo Alto Networks·04:00 PM
RemedyDescriptionSeverityWeaknessAffected Software
CVE Published
via MITRE·05:47 PM
Data Sourced
via MITRE·05:47 PM
DescriptionWeakness
Data Sourced
via NVD·06:16 PM
DescriptionSeverityWeaknessAffected Software
May 28, 2026
Advisory Published
via Palo Alto Networks·09:00 PM
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Frequently Asked Questions

1

What is the severity of CVE-2026-0263?

CVE-2026-0263 has a severity rating of HIGH due to its potential for remote code execution.

2

What systems are affected by CVE-2026-0263?

CVE-2026-0263 affects the Palo Alto Networks PAN-OS software.

3

How do I fix CVE-2026-0263?

To fix CVE-2026-0263, update to the latest version of Palo Alto Networks PAN-OS that addresses this vulnerability.

4

What type of vulnerability is CVE-2026-0263?

CVE-2026-0263 is a buffer overflow vulnerability that allows for remote code execution.

5

What can attackers do with CVE-2026-0263?

Attackers exploiting CVE-2026-0263 can execute arbitrary code with elevated privileges on the affected firewall.

Company

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