CVE-2026-0259: WildFire WF-500 and WF-500-B: Arbitrary File Read and Delete Vulnerability in WildFire Appliance (WF-500, WF-500-B)

High severity · published May 13, 2026

CVE-2026-0259

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

8.8

CVSS

0.3%

EPSS

On KEV

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.

CVSS vector

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

Attack vector

Network

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

High

Integrity

High

Availability

High

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.3% · higher than 27% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

PAN-OS · Palo Alto Networks

before 10.2.7; 10.2.8 before 10.2.10; 10.2.11 before 10.2.13; 10.2.14 before 10.2.16; 10.2.7; 10.2.7; +34 more · source: NVD

WildFire WF-500 and WF-500-B · Palo Alto Networks

12.1.0 before 12.1.7, 12.1.4-h5; 11.2.0 before 11.2.11,11.2.7-h7; 11.1.0 before 11.1.13,11.1.10-h8; 10.2.0 before 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34 · source: vendor

Affected product

PAN-OS

Palo Alto Networks

All PAN-OS CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2026-0259

CVE.org

https://www.cve.org/CVERecord?id=CVE-2026-0259

Vendor Advisory

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