CVE-2025-0111: Palo Alto Networks PAN-OS File Read Vulnerability

CVE-2025-0111 is a file-read vulnerability in Palo Alto Networks PAN-OS. An authenticated attacker who can reach the management web interface can read certain files on the PAN-OS filesystem that are accessible to the “nobody” user. Because the management plane often holds configuration, credentials, and operational data, successful abuse can give an attacker sensitive information that supports further compromise of the firewall or the networks it protects. Teams should treat exposure of the management interface as high priority and confirm exact impact and fixed releases against the vendor advisory.

How it works

The weakness is classified as CWE-73, external control of file name or path. In this class of flaw, user-supplied input influences which file the application opens or reads without sufficient validation or restriction. According to the CISA summary, an attacker who is already authenticated and has network access to the PAN-OS management web interface can cause the system to read files that the “nobody” user is permitted to access. The result is unauthorized disclosure of filesystem contents rather than remote code execution by itself. Exact request parameters, path constraints, and any required privileges beyond authentication are not detailed in the public summary; defenders must consult the Palo Alto Networks advisory for precise mechanics and any prerequisites.

Am I affected? How to find it in your systems

PAN-OS runs on Palo Alto Networks next-generation firewalls and related appliances that provide network security services. The vulnerability is reachable through the management web interface, so any device whose management plane is network-accessible is in scope until proven otherwise.

• Inventory all PAN-OS devices via asset management, configuration management databases, or network discovery that identifies Palo Alto management interfaces (commonly HTTPS on the management port or dedicated management network).
• Record the exact PAN-OS software version on each device; compare those versions against the fixed and affected lists published in the vendor advisory for CVE-2025-0111. Do not rely on version ranges stated elsewhere.
• Identify whether the management web interface is reachable from untrusted or broadly accessible networks; note any authentication methods in use (local accounts, RADIUS, SAML, etc.).
• Review management-plane access logs and web-server logs for unusual authenticated sessions or file-related requests that deviate from normal administrative activity. Telemetry indicating successful reads of unexpected paths may be present, but specific indicators of compromise are not supplied in the public summary and must be taken from the vendor or your own baseline.

If you cannot determine version or exposure status quickly, assume the device is potentially affected until the advisory confirms otherwise.

How to remediate

The primary remediation is to apply the vendor-supplied update that addresses CVE-2025-0111. Follow Palo Alto Networks’ published instructions for the specific PAN-OS release stream running on each device; test the update in a non-production environment when operational constraints allow, then deploy according to your change process. After patching, verify the new version is active and re-check that the management interface is still properly restricted.

Beyond the patch, harden the management plane for this class of issue:

• Ensure the management web interface is reachable only from dedicated management networks or jump hosts, never from the internet or general user segments.
• Enforce strong authentication, multi-factor authentication where supported, and least-privilege administrative roles.
• Disable unused management services and features that are not required for operations.
• Maintain current backups of configuration and review them for any sensitive material that could have been readable by the “nobody” user.

Confirm all version-specific steps and any additional vendor mitigations against the official advisory.

If you can't patch immediately

Until the update can be applied, reduce exposure with compensating controls:

• Segment and firewall the management interface so that only a small set of trusted administrative hosts can reach it; block all other sources.
• If a web application firewall or reverse-proxy sits in front of the management interface, apply vendor or community virtual-patch rules that restrict anomalous path or parameter patterns associated with file-read attempts; validate any such rules carefully to avoid breaking legitimate administration.
• Temporarily disable the management web interface if out-of-band console or CLI access is available and sufficient for operations.
• Increase monitoring and alerting on authentication events, session creation, and any file-access or error logs generated by the management plane; retain those logs for later forensic review.
• Limit the number of authenticated administrative accounts and rotate credentials that may have been used on exposed devices.

These measures lower risk but do not eliminate the vulnerability; schedule the official patch as soon as operationally feasible. CISA’s required action is to apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

If your data may have been exposed

Actively exploited vulnerabilities of this type can lead to data exposure or broader breaches once an attacker obtains readable files containing credentials, keys, or configuration. Known ransomware use of CVE-2025-0111 is not documented in the provided information. If you suspect the management interface was reachable by unauthorized parties, treat any sensitive material that the “nobody” user could read as potentially compromised, rotate affected credentials, and review firewall and downstream system logs for follow-on activity. You can also run a free exposure scan of your email addresses against known breach data sets to check whether related accounts appear in prior incidents.