CVE-2025-20301
6.5 MEDIUM
📋 TL;DR
This vulnerability allows an authenticated low-privileged remote attacker to bypass authorization and access troubleshoot files from different domains on the same Cisco Secure FMC instance, potentially exposing sensitive information. It affects Cisco Secure FMC Software users with multi-domain configurations.
💻 Affected Systems
Products:
- Cisco Secure FMC Software
Versions: Specific versions are detailed in the Cisco advisory; check the vendor link for exact ranges.
Operating Systems: Not specified, typically runs on Cisco-supported platforms
Default Config Vulnerable:
⚠️ Yes
Notes: Vulnerability is present in multi-domain configurations where troubleshoot files are accessible across domains.
📦 What is this software?
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
Secure Firewall Management Center by Cisco
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains unauthorized access to troubleshoot files containing sensitive domain-specific data, leading to information disclosure that could facilitate further attacks.
Likely Case
An authenticated low-privileged user accesses troubleshoot files from another domain, exposing operational or configuration details.
If Mitigated
With proper access controls and patching, the risk is minimized to authorized access only within the user's domain.
🌐 Internet-Facing: MEDIUM, as exploitation requires authentication but can be performed remotely if the interface is exposed.
🏢 Internal Only: MEDIUM, as internal attackers with low privileges could exploit it to access cross-domain files.
🎯 Exploit Status
Public PoC:
✅ No
Weaponized:
UNKNOWN
Unauthenticated Exploit:
✅ No
Complexity:
MEDIUM
Exploitation requires authenticated access and knowledge of file paths, but no advanced skills are needed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Refer to Cisco Security Advisory for patched versions.
Vendor Advisory: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-fmc-authz-bypass-M7xhnAu
Restart Required: No
Instructions:
1. Review the Cisco advisory for affected versions. 2. Apply the recommended patch or upgrade to a fixed version. 3. Verify the fix by testing authorization checks.
🔧 Temporary Workarounds
Restrict Access to Troubleshoot Files
allLimit access to troubleshoot files by implementing strict access controls and monitoring file access logs.
🧯 If You Can't Patch
- Implement network segmentation to isolate the FMC management interface from untrusted networks.
- Enforce strong authentication and monitor for unauthorized access attempts to troubleshoot files.
🔍 How to Verify
Check if Vulnerable:
Check the Cisco Secure FMC version against the advisory; if running an affected version in a multi-domain setup, it may be vulnerable.Check Version:
Log into Cisco Secure FMC and check the version in the web interface or use CLI commands specific to the platform.Verify Fix Applied:
After patching, test by attempting to access troubleshoot files from a low-privileged account across domains; access should be denied.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access logs to troubleshoot files from low-privileged users across domains.
Network Indicators:
- Unusual HTTP requests to troubleshoot file paths from authenticated sessions.
SIEM Query:
Example: 'source="Cisco_FMC" AND event_type="file_access" AND user_privilege="low" AND file_path="*/troubleshoot/*" AND domain!="user_domain"'