Log in Start free

Vulnerability · Published May 13, 2026 · Assigned by palo_alto

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

Medium 5.0

In plain English

A medium-severity security flaw in WildFire WF-500 and WF-500-B from Palo Alto Networks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 4.0)5.0Medium
Exploit odds (30 days)0.3%top 72.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

VendorProductVersions
Palo Alto Networks WildFire WF-500 and WF-500-B 12.1.0 – before 12.1.7, 12.1.4-h511.2.0 – before 11.2.11,11.2.7-h711.1.0 – before 11.1.13,11.1.10-h810.2.0 – before 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34

Weakness: CWE-73 · 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

References