CVE-2026-0259CWE-73

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

Medium · published May 13, 2026

CVSS v4.0
5.0
EPSS
0%
Percentile
25.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.0 · MEDIUM
Vector
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
EPSS
0.00336 · 25.7th percentile
Weakness
CWE-73 · External Control of File Name or Path
Published
2026-05-13T18:05Z
EPSS history
Timeline
  • 13 MAY 18:05Z
    WildFire WF-500 and WF-500-B: Arbitrary File Read and Delete Vulnerability in WildFire Appliance (WF-500, WF-500-B)
    cvelistv5