CVE-2026-0259
CVE-2026-0259 is a medium-severity vulnerability with a CVSS 4.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-73.
Key facts
- Severity: Medium (CVSS 4.0 base score 5.0)
- EPSS exploit prediction: 0% (20th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-30106
- Weakness: CWE-73
- Published:
- Last modified:
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.
Frequently asked questions
- What is 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.
- How severe is CVE-2026-0259?
- CVE-2026-0259 has a CVSS 4.0 base score of 5.0, rated medium severity.
- Is CVE-2026-0259 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (20th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2026-0259?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-0259 have an EU (EUVD) identifier?
- Yes. CVE-2026-0259 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-30106.
- When was CVE-2026-0259 published?
- CVE-2026-0259 was published on 2026-05-13 and last updated on 2026-06-17.
References
Other CWE-73 vulnerabilities
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