How severe is CVE-2026-0259?

CVE-2026-0259 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-0259 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-0259?

CVE-2026-0259 primarily affects Paloaltonetworks Pan-os. In total, 159 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

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. Given its high severity, prioritise patching exposed systems.

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 2026-07-14.

CVE-2026-0259

CVE-2026-0259 is a high-severity vulnerability in Paloaltonetworks Pan-os with a CVSS 3.x base score of 8.8. 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: High (CVSS 3.x base score 8.8)
CVSS v4: 5.0
EPSS exploit prediction: 0% (25th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-30106
Weakness: CWE-73
Affected product: Paloaltonetworks Pan-os
Published: 2026-05-13
Last modified: 2026-07-14

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 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-0259 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (25th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-0259?: CVE-2026-0259 primarily affects Paloaltonetworks Pan-os. In total, 159 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
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. Given its high severity, prioritise patching exposed systems.
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 2026-07-14.

References

https://security.paloaltonetworks.com/CVE-2026-0259

Affected products (159)

cpe:2.3:o:paloaltonetworks:pan-os:*:*:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h10:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h11:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h12:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h13:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h14:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h15:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h16:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h17:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h18:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h19:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h20:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h21:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h22:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h23:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h24:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h3:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h32:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h4:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h5:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h6:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h7:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h8:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.7:h9:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:-:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h1:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h10:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h11:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h12:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h13:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h14:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h17:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h18:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h2:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h21:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h27:*:*:*:*:*:*
cpe:2.3:o:paloaltonetworks:pan-os:10.2.10:h3:*:*:*:*:*:*

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