CVE-2020-2039: Palo Alto Networks PAN-OS

Medium severity, CVSS 5.3. EPSS: 46.4% chance of exploitation in the next 30 days.

An uncontrolled resource consumption vulnerability in Palo Alto Networks PAN-OS allows for a remote unauthenticated user to upload temporary files through the management web interface that are not properly deleted after the request is finished. It is possible for an attacker to disrupt the availability of the management web interface by repeatedly uploading files until available disk space is exhausted. This issue impacts: PAN-OS 8.1 versions earlier than PAN-OS 8.1.16; PAN-OS 9.0 versions earlier than PAN-OS 9.0.10; PAN-OS 9.1 versions earlier than PAN-OS 9.1.4; PAN-OS 10.0 versions earlier than PAN-OS 10.0.1.

Affected products

• Palo Alto Networks PAN-OS: from 8.1.0, before 8.1.16 (fixed in 8.1.16); from 9.0.0, before 9.0.10 (fixed in 9.0.10); from 9.1.0, before 9.1.4 (fixed in 9.1.4); from 10.0.0, before 10.0.1 (fixed in 10.0.1)

Published 2020-09-09. Last modified 2026-06-17.