CVE-2026-0259

WildFire WF-500 and WF-500-B: Arbitrary File Read and Delete Vulnerability in WildFire Appliance (WF-500, WF-500-B)

State: Published
Severity: 5.0 Medium
Published: May 13, 2026
Updated: May 13, 2026
Reserved: Nov 3, 2025

Description

An arbitrary File Read and Delete Vulnerability in Palo Alto Networks WildFire® WF-500 and WF-500-B appliances enables users to read sensitive information and delete arbitrary files. This vulnerability affects WF-500 and WF-500-B appliances running in the default non-FIPS configuration mode.

The WildFire Appliance (WF-500, WF-500-B) software update is now available to customers that use the WildFire Appliance (WF-500, WF-500-B) for on-premise sandboxing.

Please note that customers using the WildFire Public cloud service are NOT impacted by this vulnerability.

Scores

CVSS	Score	Vector	Source
4.0	5.0 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/AU:Y/R:U/V:C/RE:M/U:Amber	palo_alto

Weaknesses

CWE-73 External Control of File Name or Path

Affected Products

Product	Versions
WildFire WF-500 and WF-500-BPalo Alto Networks	12.1.0 to before 12.1.7, 12.1.4-h5Affectedfrom 12.1.7Not affectedfrom 12.1.4-h5Not affected 11.2.0 to before 11.2.11,11.2.7-h7Affectedfrom 11.2.12Not affectedfrom 11.2.10-h6Not affectedfrom 11.2.7-h13Not affectedfrom 11.2.4-h17Not affected 11.1.0 to before 11.1.13,11.1.10-h8Affectedfrom 11.1.15Not affectedfrom 11.1.13-h5Not affectedfrom 11.1.10-h25Not affectedfrom 11.1.7-h6Not affectedfrom 11.1.6-h32Not affectedfrom 11.1.4-h33Not affected 10.2.0 to before 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34Affectedfrom 10.2.18-h6Not affectedfrom 10.2.16-h7Not affectedfrom 10.2.13-h21Not affectedfrom 10.2.10-h36Not affectedfrom 10.2.7-h34Not affected

Product

Versions

WildFire WF-500 and WF-500-BPalo Alto Networks

12.1.0 to before 12.1.7, 12.1.4-h5Affectedfrom 12.1.7Not affectedfrom 12.1.4-h5Not affected
11.2.0 to before 11.2.11,11.2.7-h7Affectedfrom 11.2.12Not affectedfrom 11.2.10-h6Not affectedfrom 11.2.7-h13Not affectedfrom 11.2.4-h17Not affected
11.1.0 to before 11.1.13,11.1.10-h8Affectedfrom 11.1.15Not affectedfrom 11.1.13-h5Not affectedfrom 11.1.10-h25Not affectedfrom 11.1.7-h6Not affectedfrom 11.1.6-h32Not affectedfrom 11.1.4-h33Not affected
10.2.0 to before 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34Affectedfrom 10.2.18-h6Not affectedfrom 10.2.16-h7Not affectedfrom 10.2.13-h21Not affectedfrom 10.2.10-h36Not affectedfrom 10.2.7-h34Not affected

References

https://security.paloaltonetworks.com/CVE-2026-0259vendor-advisory

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