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

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Summary

CVECVE-2026-0259
StatePUBLISHED
Assignerpalo_alto
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-13 19:17:01 UTC
Updated2026-05-14 16:21:23 UTC
DescriptionAn 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.

Risk And Classification

Primary CVSS: v4.0 5 MEDIUM from [email protected]

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:C/RE:M/U:Amber

EPSS: 0.000560000 probability, percentile 0.174600000 (date 2026-05-25)

Problem Types: CWE-73 | CWE-73 CWE-73 External Control of File Name or Path

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary5MEDIUMCVSS: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/C...
4.0CNACVSS5MEDIUMCVSS: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/A...

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
Low
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:C/RE:M/U:Amber

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Palo Alto Networks WildFire WF-500 And WF-500-B affected 12.1.0 12.1.7, 12.1.4-h5 custom Not specified
CNA Palo Alto Networks WildFire WF-500 And WF-500-B affected 11.2.0 11.2.11,11.2.7-h7 custom Not specified
CNA Palo Alto Networks WildFire WF-500 And WF-500-B affected 11.1.0 11.1.13,11.1.10-h8 custom Not specified
CNA Palo Alto Networks WildFire WF-500 And WF-500-B affected 10.2.0 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34 custom Not specified

References

ReferenceSourceLinkTags
security.paloaltonetworks.com/CVE-2026-0259 [email protected] security.paloaltonetworks.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Palo Alto Networks thanks our internal security research teams for discovering and reporting this issue. (en)

Additional Advisory Data

SourceTimeEvent
CNA2026-05-13T16:00:00.000ZInitial publication.

Solutions

CNA: VERSION MINOR VERSION RANGE SUGGESTED SOLUTION WildFire WF-500 and WF-500-B 12.1 12.1.5 through 12.1.6 Upgrade to 12.1.7 or later. 12.1.2 through 12.1.4-h* Upgrade to 12.1.4-h5 or 12.1.7 or later. WildFire WF-500 and WF-500-B 11.2 11.2.11 or later Upgrade to 11.2.12 or later. 11.2.8 through 11.2.10-h* Upgrade to 11.2.10-h6 or 11.2.12 or later. 11.2.5 through 11.2.7-h* Upgrade to 11.2.7-h13 or 11.2.12 or later. 11.2.0 through 11.2.4-h* Upgrade to 11.2.4-h17 or 11.2.12 or later. WildFire WF-500 and WF-500-B 11.1 11.1.14 or later Upgrade to 11.1.15 or later. 11.1.11 through 11.1.13-h* Upgrade to 11.1.13-h5 or 11.1.15 or later. 11.1.8 through 11.1.10-h* Upgrade to 11.1.10-h25 or 11.1.15 or later. 11.1.7 through 11.1.7-h* Upgrade to 11.1.7-h6 or 11.1.15 or later. 11.1.5 through 11.1.6-h* Upgrade to 11.1.6-h32 or 11.1.15 or later. 11.1.0 through 11.1.4-h* Upgrade to 11.1.4-h33 or 11.1.15 or later. WildFire WF-500 and WF-500-B 10.2 10.2.17 through 10.2.18-h* Upgrade to 10.2.18-h6 or later. 10.2.14 through 10.2.16-h* Upgrade to 10.2.16-h7 or 10.2.18-h6 or later. 10.2.11 through 10.2.13-h* Upgrade to 10.2.13-h21 or 10.2.18-h6 or later. 10.2.8 through 10.2.10-h* Upgrade to 10.2.10-h36 or 10.2.18-h6 or later. 10.2.0 through 10.2.7-h* Upgrade to 10.2.7-h34 or 10.2.18-h6 or later. WildFire WF-500 and WF-500-B 10.1 All (EoL) No fix planned. Upgrade to a supported version.

Workarounds

CNA: 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 (Applications and Threats content version 9100-10044 and later). Please note that this Threat ID requires SSL Decryption.

Exploits

CNA: Palo Alto Networks is not aware of any malicious exploitation of this issue.

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