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CVE-2021-3036

MediumPublished

PAN-OS: Administrator secrets are logged in web server logs when using the PAN-OS XML API incorrectly

Published: Apr 20, 2021
Updated: Sep 17, 2024
Assigning CNA: palo_alto
Evidence observed: Aug 8, 2026

Primary CVSS

4.4/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

EPSS probability estimate

0.2%

Low · next 30 days

Percentile: 16.4%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

CVE-2021-3064Exploit
Exploit for CVE-2021-3036, HTTP Smuggling + buffer overflow in PanOS 8.x

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