CVE-2021-3059: Palo Alto Networks PAN-OS

High severity, CVSS 8.1. EPSS: 1.5% chance of exploitation in the next 30 days.

An OS command injection vulnerability in the Palo Alto Networks PAN-OS management interface exists when performing dynamic updates. This vulnerability enables a man-in-the-middle attacker to execute arbitrary OS commands to escalate privileges. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.20-h1; PAN-OS 9.0 versions earlier than PAN-OS 9.0.14-h3; PAN-OS 9.1 versions earlier than PAN-OS 9.1.11-h2; PAN-OS 10.0 versions earlier than PAN-OS 10.0.8; PAN-OS 10.1 versions earlier than PAN-OS 10.1.3. Prisma Access customers that have Prisma Access 2.1 Preferred or Prisma Access 2.1 Innovation firewalls are impacted by this issue.

Affected products

• Palo Alto Networks PAN-OS: from 8.1.0, up to and including 8.1.20; from 9.0.0, up to and including 9.0.14; from 9.1.0, up to and including 9.1.11; from 10.0.0, before 10.0.8 (fixed in 10.0.8); from 10.1.0, before 10.1.3 (fixed in 10.1.3)

Published 2021-11-10. Last modified 2026-06-17.