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CVE-2020-2039

PAN-OS: Management web interface denial-of-service (DoS) through unauthenticated file upload

Medium5.3EPSS 46.4%
Published
Updated
Reserved
Assigned by
palo_alto

Description

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.

Timeline

  1. ID reserved

    By palo_alto

  2. · 9 months later

    Published

  3. · 4 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2020-2039, by who scored it
Scored byCVSSScoreVector
palo_altoCNA (assigner)3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
NVDNVD · Modified3.1Medium5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
EPSS (exploitation in 30 days)
46.4% · top 1.2% of all CVEs (7 Nov 2026)
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.3.

Weakness

Affected products

  • Palo Alto Networks · PAN-OS

    • affected 9.1 – < 9.1.4
    • affected 8.1 – < 8.1.16
    • affected 9.0 – < 9.0.10
    • affected 10.0 – < 10.0.1

What to do

Solution: This issue is fixed in PAN-OS 8.1.16, PAN-OS 9.0.10, PAN-OS 9.1.4, PAN-OS 10.0.1, and all later PAN-OS versions.

Workaround: This issue impacts the PAN-OS management web interface but you can mitigate the impact of this issue by following best practices for securing the PAN-OS management web interface. Please review the Best Practices for Securing Administrative Access in the PAN-OS technical documentation, available at https://docs.paloaltonetworks.com/best-practices.

Exploitation: Palo Alto Networks is not aware of any malicious attempts to exploit this vulnerability.

References (1)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .