CVE-2021-3036: Palo Alto Networks PAN-OS

Medium severity, CVSS 4.4. EPSS: 0.2% chance of exploitation in the next 30 days.

An information exposure through log file vulnerability exists in Palo Alto Networks PAN-OS software where secrets in PAN-OS XML API requests are logged in cleartext to the web server logs when the API is used incorrectly. This vulnerability applies only to PAN-OS appliances that are configured to use the PAN-OS XML API and exists only when a client includes a duplicate API parameter in API requests. Logged information includes the cleartext username, password, and API key of the administrator making the PAN-OS XML API request.

Affected products

• Palo Alto Networks PAN-OS: from 8.1.0, before 8.1.19 (fixed in 8.1.19); from 9.0.0, before 9.0.12 (fixed in 9.0.12); from 9.1.0, before 9.1.6 (fixed in 9.1.6); from 10.0.0, before 10.0.1 (fixed in 10.0.1)

Published 2021-04-20. Last modified 2026-06-17.