Vulnerability in Palo Alto Networks Wildfire Wf-500 And Wf-500-B
CVE-2026-0259
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (24.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 24th percentile — 24.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Palo Alto Networks Wildfire Wf-500 And Wf-500-B — versions 12.1.0, 11.2.0, 11.1.0
- Paloaltonetworks Pan-Os — versions 10.2.7, 10.2.10, 10.2.13
- Paloaltonetworks Wf-500
- Paloaltonetworks Wf-500-B
Weakness classification (CWE)
References
- security.paloaltonetworks.com/CVE-2026-0259 (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-0259?
- CVE-2026-0259 is a high-severity vulnerability in Palo Alto Networks Wildfire Wf-500 And Wf-500-B, classified under External Control of File Name or Path. CVSS score: 8.8/10. Published 2026-05-13.
- How severe is CVE-2026-0259?
- High severity. CVSS v3 base score is 8.8 out of 10.