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

This high-severity Palo Alto Networks advisory covers CVE-2026-0259 affecting WildFire.

CVE-2026-0259 Published May 28, 2026

CVE-2026-0259

Affected products & platforms

Palo Alto NetworksWildFire

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Summary

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

Affected versions

WildFire WF-500 and WF-500-B < 12.1.7
WildFire WF-500 and WF-500-B < 11.2.12
WildFire WF-500 and WF-500-B < 11.1.15
WildFire WF-500 and WF-500-B < 10.2.7-h34

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

WildFire WF-500 and WF-500-B >= 12.1.7
WildFire WF-500 and WF-500-B >= 12.1.4-h5
WildFire WF-500 and WF-500-B >= 11.2.12
WildFire WF-500 and WF-500-B >= 11.2.10-h6
WildFire WF-500 and WF-500-B >= 11.2.7-h13
WildFire WF-500 and WF-500-B >= 11.2.4-h17
WildFire WF-500 and WF-500-B >= 11.1.15
WildFire WF-500 and WF-500-B >= 11.1.13-h5
WildFire WF-500 and WF-500-B >= 11.1.10-h25
WildFire WF-500 and WF-500-B >= 11.1.7-h6
WildFire WF-500 and WF-500-B >= 11.1.6-h32
WildFire WF-500 and WF-500-B >= 11.1.4-h33
WildFire WF-500 and WF-500-B >= 10.2.18-h6
WildFire WF-500 and WF-500-B >= 10.2.16-h7
WildFire WF-500 and WF-500-B >= 10.2.13-h21
WildFire WF-500 and WF-500-B >= 10.2.10-h36
WildFire WF-500 and WF-500-B >= 10.2.7-h34

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Upgrade to a supported version.

Temporary workarounds

For airgapped deployments, we strongly recommend that you secure WildFire 500 appliances by restricting access to only trusted internal IP addresses.
Customers with a Threat Prevention subscription can block attacks for this vulnerability by enabling Threat ID 510010 (from Applications and Threats content version 9100-10044 and later).
Please note that this Threat ID requires SSL Decryption.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Palo Alto Networks Security Advisoriesofficial
Official vendor feed — the source of truth for this advisory. VulniPulse polled this feed and parsed this entry from it. Discovered from the machine-readable feed https://security.paloaltonetworks.com/rss.xml; this link opens the Palo Alto Networks advisory index instead of the raw feed document.
Palo Alto Networks
Vendor advisory pageofficial
Advisory page fetched and parsed to extract affected/fixed versions and mitigation guidance beyond what the feed carries.
Palo Alto Networks

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-0259NVD CVE.org MITRE

Official resources

Palo Alto Networks Security Advisories portal
Official documentation
Canonical advisory portal — check here for the latest revision of this advisory and affected-version updates.

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