CVE-2025-26487
📋 TL;DR
An unauthenticated Server-Side Request Forgery (SSRF) vulnerability in Infinera MTC-9 allows attackers to make the appliance send HTTPS requests to internal network resources, potentially accessing sensitive systems. This affects Infinera MTC-9 appliances with vulnerable versions exposed to untrusted networks. Remote attackers can exploit this without credentials.
💻 Affected Systems
- Infinera MTC-9
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers pivot through the appliance to access internal systems, steal credentials, execute commands on backend servers, or exfiltrate sensitive data from protected networks.
Likely Case
Attackers scan internal networks, access metadata services, interact with internal APIs, or retrieve information from systems behind the appliance.
If Mitigated
Limited to port scanning internal networks or accessing only non-sensitive services if proper network segmentation and access controls are implemented.
🎯 Exploit Status
SSRF vulnerabilities typically require minimal technical skill to exploit using tools like Burp Suite or curl. Attackers need network access to the appliance.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified
Vendor Advisory: https://www.cvcn.gov.it/cvcn/cve/CVE-2025-26487
Restart Required: No
Instructions:
1. Monitor Infinera security advisories for patch availability. 2. Apply vendor-provided firmware update when released. 3. Verify patch installation and test functionality.
🔧 Temporary Workarounds
Network Segmentation
allRestrict appliance network access to only required internal resources using firewall rules
Access Control Lists
allImplement ACLs to limit which IP addresses can communicate with the appliance
🧯 If You Can't Patch
- Isolate appliance in dedicated network segment with strict egress filtering
- Implement web application firewall (WAF) with SSRF protection rules
🔍 How to Verify
Check if Vulnerable:
Test if appliance accepts and processes external URLs via HTTPS requests. Use SSRF testing tools to attempt requests to internal resources.Check Version:
Check appliance web interface or CLI for firmware version informationVerify Fix Applied:
After applying vendor patch, retest SSRF attempts to confirm they are blocked or properly validated.📡 Detection & Monitoring
Log Indicators:
- Unusual outbound HTTPS requests from appliance
- Requests to internal IP addresses or metadata services
- Failed authentication attempts from appliance IP
Network Indicators:
- Appliance making unexpected HTTPS connections to internal systems
- Traffic patterns suggesting port scanning from appliance
SIEM Query:
source_ip="[appliance_ip]" AND (dest_port=443 OR protocol="HTTPS") AND dest_ip IN (private_ip_ranges)