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NVD / CVE Program· CNA palo_alto

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

MediumCVSS 5.0 · v4.0—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 20/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.33% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Palo Alto Networks WildFire WF-500 and WF-500-B 10.2.10-h36, 10.2.13-h21, 10.2.16-h7.

Low priority for now. Upgrade to Palo Alto Networks WildFire WF-500 and WF-500-B 10.2.10-h36, 10.2.13-h21, 10.2.16-h7 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

Published
May 13, 2026
Updated
Oct 26, 2026
EPSS
0.3% · 27th percentile

Report tools

JSON

Action score

20

Monitor

Low priority for now.

CVSS
20 / 40 · 5.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.3%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · palo_alto
5.0
NVD has not scored this yet; the score shown is the CNA’s.

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/AU:Y/R:U/V:C/RE:M/U:Amber

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-0259

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
paloaltonetworkspan-os
paloaltonetworkswf-500
paloaltonetworkswf-500-b

Using pan-os? Add it to your stack and be the first to know about CVEs like this one. (Firewall)

Watch new CVEs for pan-os

When you'll hear from us

  • when a new CVE affecting this product is published
  • when a record in your stack enters KEV or is weaponized

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits every 10 minutes on paid plans, on the hour on the free plan.

Your free account also gets you

  • CVE alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools, at most 30 a day (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every Monday

Versions reported by the vendor

Affected version ranges reported by the assigning authority (palo_alto). Independent of NVD's CPE analysis and usually ahead of it.

  • Palo Alto Networks WildFire WF-500 and WF-500-B

    • 12.1.0 and later · before 12.1.7, 12.1.4-h5affectedfixed in 12.1.7, 12.1.4-h5
    • 11.2.0 and later · before 11.2.11,11.2.7-h7affectedfixed in 11.2.12, 11.2.10-h6, 11.2.7-h13, 11.2.4-h17
    • 11.1.0 and later · before 11.1.13,11.1.10-h8affectedfixed in 11.1.15, 11.1.13-h5, 11.1.10-h25, 11.1.7-h6, 11.1.6-h32, 11.1.4-h33
    • 10.2.0 and later · before 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34affectedfixed in 10.2.18-h6, 10.2.16-h7, 10.2.13-h21, 10.2.10-h36, 10.2.7-h34
Affected versions · NVD (20)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • paloaltonetworks pan-os11.2.8 and later · before 11.2.10
  • paloaltonetworks pan-os10.2.8 and later · before 10.2.10
  • paloaltonetworks pan-os10.2.11 and later · before 10.2.13
  • paloaltonetworks pan-os10.2.14 and later · before 10.2.16
  • paloaltonetworks pan-os11.1.0 and later · before 11.1.4
  • paloaltonetworks pan-os11.1.5 and later · before 11.1.6
  • paloaltonetworks pan-os11.1.8 and later · before 11.1.10
  • paloaltonetworks pan-os11.1.11 and later · before 11.1.13
  • paloaltonetworks pan-osbefore 10.2.7
  • paloaltonetworks pan-os12.1.5 and later · before 12.1.7
  • paloaltonetworks pan-os11.2.0 and later · before 11.2.4
  • paloaltonetworks pan-os11.2.5 and later · before 11.2.7
  • paloaltonetworks pan-os12.1.0 and later · before 12.1.4
  • paloaltonetworks pan-os10.2.10
  • paloaltonetworks pan-os10.2.13
  • paloaltonetworks pan-os10.2.16
  • paloaltonetworks pan-os10.2.17
  • paloaltonetworks pan-os10.2.18
  • paloaltonetworks pan-os10.2.7
  • paloaltonetworks pan-os11.1.10

Same product

paloaltonetworks: all records

Other highest-scoring records for the same primary product.

  • CVE-2024-3400PAN-OS: Arbitrary File Creation Leads to OS Command Injection Vulnerability in GlobalProtectKEV
    100Now
  • CVE-2017-15944Palo Alto Networks PAN-OS before 6.1.19, 7.0.x before 7.0.19, 7.1.x before 7.1.14, and 8.0.x before 8.0.6 allows remote attackers to…KEV
    99Now
  • CVE-2024-0012PAN-OS: Authentication Bypass in the Management Web Interface (PAN-SA-2024-0015)KEV
    97Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-0257May 13, 2026 · PAN-OS: GlobalProtect Authentication Bypass VulnerabilitiesKEV
    90Now
  • ← EarlierCVE-2026-0258May 13, 2026 · PAN-OS: Server-Side Request Forgery (SSRF) in IKEv2 Certificate URL Fetching
    19Monitor
  • Later →CVE-2026-0261May 13, 2026 · PAN-OS: Authenticated Admin Command Injection Vulnerability
    24Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Palo Alto Networks WildFire WF-500 and WF-500-B10.2.10-h36Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B10.2.13-h21Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B10.2.16-h7Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B10.2.18-h6Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B10.2.7-h34Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B11.1.10-h25Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B11.1.13-h5Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B11.1.15Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B11.1.4-h33Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B11.1.6-h32Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B11.1.7-h6Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B11.2.10-h6Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B11.2.12Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B11.2.4-h17Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B11.2.7-h13Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B12.1.4-h5Vendor (CNA)
Palo Alto Networks WildFire WF-500 and WF-500-B12.1.7Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2025-0111455 days apartPAN-OS: Authenticated File Read Vulnerability in the Management Web InterfaceKEV
    59Plan
  • CVE-2025-0124398 days apartPAN-OS: Authenticated File Deletion Vulnerability on the Management Web Interface
    20Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

  • CVE-2026-02570 days apartPAN-OS: GlobalProtect Authentication Bypass VulnerabilitiesKEV
    90Now
  • CVE-2026-02650 days apartPAN-OS: Authentication Bypass with Cloud Authentication Service (CAS) enabled
    60This week

Not on record for this CVE: EPSS history · patch commit or PR link · public bounty program.

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
Integrity
Availability
Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
X

Weakness class (CWE)

CWE-73 · External Control of File Name or Path

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records