CVE-2026-0259: An arbitrary File Read and Delete Vulnerability in Palo Alto Networks WildFire® WF-500 and WF-500-B appliances

Q: How do I fix CVE-2026-0259?

pan-os: upgrade to 10.2.7, 10.2.10, 10.2.13, 10.2.16, 11.1.4, 11.1.6, 11.1.10, 11.1.13, 11.2.4, 11.2.7, 11.2.10, 12.1.4, 12.1.7. Exact commands for each OS are on this page.

Q: Is CVE-2026-0259 being exploited?

CVE-2026-0259 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-0259 affect?

CVE-2026-0259 affects pan-os. Severity is high (CVSS 8.8). 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

Routine

HIGH 8.8UPGRADE

CVE-2026-0259 is a high-severity flaw (CVSS 8.8) affecting pan-os. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	8.8 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-73
Published	2026-05-13
Last modified	2026-10-26

Publisher (CNA): Palo Alto Networks, Inc. · Vendor: paloaltonetworks

Last updated 2026-10-26 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-05-13 19:17 UTCPublished CVE record published
2026-10-26 17:10 UTCUpdated Record last modified

paloaltonetworks pan-os UPGRADE

Affected: < 10.2.7 · >= 10.2.8 and < 10.2.10 · >= 10.2.11 and < 10.2.13 · >= 10.2.14 and < 10.2.16 · 10.2.7 · 10.2.7 h1 · 10.2.7 h10 · 10.2.7 h11

Fixed in: 10.2.7, 10.2.10, 10.2.13, 10.2.16, 11.1.4, 11.1.6, 11.1.10, 11.1.13, 11.2.4, 11.2.7, 11.2.10, 12.1.4, 12.1.7

Safe to downgrade to: a release before 10.2.7

Check your OS release

cat /etc/os-release; uname -r

Debian / Ubuntu

sudo apt update && sudo apt full-upgrade

RHEL / Amazon Linux / Fedora

sudo dnf upgrade --refresh

Windows

Install the latest cumulative update from Windows Update

If no patch exists yet

OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-0259?

pan-os: upgrade to 10.2.7, 10.2.10, 10.2.13, 10.2.16, 11.1.4, 11.1.6, 11.1.10, 11.1.13, 11.2.4, 11.2.7, 11.2.10, 12.1.4, 12.1.7. Exact commands for each OS are on this page.

Is CVE-2026-0259 being exploited?

CVE-2026-0259 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-0259 affect?

CVE-2026-0259 affects pan-os. Severity is high (CVSS 8.8). 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

How urgent is CVE-2026-0259?

Priority 37/100. High severity

Software pages

Palo Alto PAN-OS vulnerabilities

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References

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