CVE-2025-0111 is a file read vulnerability in Palo Alto Networks PAN-OS. CISA added it to the Known Exploited Vulnerabilities catalogue on 20 February 2025, which means attackers have used it in real attacks. Palo Alto Networks PAN-OS contains an external control of file name or path vulnerability.
What this vulnerability means in PAN-OS
CVE-2025-0111 is an external control of file name or path issue in Palo Alto Networks PAN-OS, which means a user-controlled path or filename can be handled in an unsafe way. In practice, that class of flaw can expose files that should remain internal, configuration-sensitive, or operationally restricted.
File read vulnerabilities are dangerous in security appliances because they may reveal configuration data, logs, credentials, or other internal state that attackers can use to map the environment. When the affected product is an internet-facing security control, the exposure can sit directly on a trust boundary rather than inside a protected application tier.
How exposure is usually assessed
The first question is whether your environment actually runs the vulnerable PAN-OS build on any exposed or internally reachable device. That usually requires an accurate asset inventory, clear ownership for perimeter appliances, and a check against the vendor advisory and the NIST National Vulnerability Database or CISA KEV entry for patch and version guidance.
For this type of issue, exposure is often broader than the obvious edge firewall because management interfaces, auxiliary services, and administrative paths can all matter. If you cannot confirm the exact product instance and software branch, you cannot reliably conclude that you are safe.
Why file read flaws are especially sensitive here
A file read weakness on a security platform can be more than a disclosure event. The attacker may learn details that support later exploitation, such as internal paths, tokens, operational notes, or configuration values that reduce the effort needed for follow-on compromise.
That is why vulnerability records and exploit tracking matter. The official CVE Program establishes the identifier, while CISA KEV status signals that exploitation has occurred in the wild, which raises the urgency of remediation and review.
Remediation, detection, and post-patch review
Remediation should follow the vendor’s published fix path, but when immediate patching is not possible, organisations should reduce exposure by tightening reachability, restricting administrative access, and increasing monitoring around the appliance and any adjacent management plane. If the device is externally reachable, temporary isolation or compensating controls may be necessary until a fix is applied.
After patching, do not assume the issue ends there. Review logs, access traces, and related configuration material for signs that file contents were already read, and consider whether any exposed secrets, session material, or administrative credentials need rotation. The practical lesson is similar to other exploited file-access flaws, where post-compromise review matters as much as the patch itself.
Risk and Threat Considerations
This kind of flaw is risky because a file read on a perimeter security product can expose the very information that defenders rely on to keep the environment segmented and controlled. If attackers can retrieve sensitive files, they may gain reconnaissance data or secret material that enables escalation and persistence.
Failure mechanism: The attacker abuses unsafe path handling to request files that should not be directly accessible, then uses the returned contents to support deeper compromise or lateral movement.
Impact: Exposure can include configuration data, internal metadata, or secrets, which may lead to broader network compromise if those values are reused elsewhere.
Standards & Framework Alignment
This section maps relevant standards and security frameworks to the operational risks and controls described in this guidance.
MITRE ATT&CK addresses the attack and risk surface, while NIST SP 800-53 Rev 5, CIS Controls v8 and NIST CSF 2.0 set the governance and control requirements practitioners need to meet.
| Framework | Control / Reference | Relevance |
|---|---|---|
| NIST SP 800-53 Rev 5 | SI-10 — Information Input Validation | File read flaws arise from unsafe handling of user-controlled paths and filenames. |
| RA-5 — Vulnerability Monitoring and Scanning | The term is a live CVE with KEV relevance, so exposure management is central. | |
| Recommendation — Validate and constrain file path inputs before they reach filesystem operations. Track KEV-listed appliance CVEs and verify affected assets in your inventory. | ||
| CIS Controls v8 | CIS-7 — Continuous Vulnerability Management | This CVE requires rapid identification, prioritisation, and remediation of exposed assets. |
| Recommendation — Prioritise and remediate exploitable appliance vulnerabilities using asset-aware scanning. | ||
| NIST CSF 2.0 | PR.PS-01 — Platform Security | Security appliances need hardened configuration and controlled exposure to reduce attack surface. |
| Recommendation — Harden appliance exposure and restrict administrative interfaces to trusted networks. | ||
| MITRE ATT&CK | T1005 — Data from Local System | File-read exploitation maps to adversary collection of local files and internal data. |
| Recommendation — Hunt for unauthorized file collection on exposed appliances and correlate it with subsequent access. | ||
Practitioner Guidance
Why practitioners should care: Treat exploitable file read issues on security appliances as high-priority because they can collapse multiple defenses at once, especially when the device holds trust relationships, management credentials, or operational secrets.
What to watch for: Look for unexplained file access patterns, unusual requests to management or web interfaces, and follow-on activity that suggests an attacker used disclosure to probe other internal systems.
Practitioner takeaway: For internet-facing security infrastructure, patching should be paired with exposure review and secret hygiene, because disclosure on the gateway often becomes an access problem elsewhere.
Related resources from NHI Mgmt Group
- What does the Palo Alto Networks and CyberArk deal mean for NHI governance?
- What does the Palo Alto Networks acquisition of CyberArk mean for identity governance teams?
- Why does CVE-2025-24813 create a serious risk when Tomcat uses file based session storage?
- What should security teams do first when a PAN-OS DNS Security firewall may be affected by CVE-2024-3393?
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Reviewed and updated by the NHIMG editorial team on October 17, 2026.
NHI Mgmt Group — the #1 independent authority on Non-Human Identity, IAM, and Agentic AI security. nhimg.org