CVE-2025-13658
📋 TL;DR
This vulnerability in Longwatch devices allows unauthenticated attackers to execute arbitrary code with SYSTEM-level privileges via HTTP GET requests to an exposed endpoint. The issue stems from missing code signing and execution controls. Industrial control systems using affected Longwatch devices are at risk.
💻 Affected Systems
- Longwatch devices (specific models not detailed in advisory)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code with SYSTEM privileges, potentially leading to operational disruption, data theft, or lateral movement within industrial networks.
Likely Case
Remote code execution enabling attackers to install malware, exfiltrate sensitive industrial data, or disrupt device functionality.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to vulnerable endpoints.
🎯 Exploit Status
The vulnerability is trivially exploitable via unauthenticated HTTP requests. No public exploit code is mentioned in the advisory.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in advisory - contact vendor for patched version
Vendor Advisory: https://www.cisa.gov/news-events/ics-advisories/icsa-25-336-01
Restart Required: Yes
Instructions:
1. Contact Longwatch vendor for patched firmware. 2. Backup device configuration. 3. Apply firmware update following vendor instructions. 4. Restart device. 5. Verify fix by testing the vulnerable endpoint.
🔧 Temporary Workarounds
Network Segmentation
allIsolate Longwatch devices in separate network segments with strict firewall rules.
# Configure firewall to block external access to Longwatch HTTP ports
# Example: iptables -A INPUT -p tcp --dport 80 -s ! trusted_network -j DROP
Access Control Lists
allRestrict HTTP access to trusted IP addresses only.
# Configure web server or firewall to allow only specific IPs
# Example Apache: Require ip 192.168.1.0/24
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Longwatch devices from untrusted networks
- Deploy web application firewall (WAF) rules to block malicious HTTP requests to vulnerable endpoints
🔍 How to Verify
Check if Vulnerable:
Test if unauthenticated HTTP GET requests to device endpoints can trigger code execution. Use caution as testing may cause system instability.Check Version:
Check device web interface or use vendor-specific CLI commands to verify firmware versionVerify Fix Applied:
After patching, attempt the same HTTP GET request that previously caused code execution - it should now be blocked or return an error.📡 Detection & Monitoring
Log Indicators:
- Unusual HTTP GET requests to device endpoints
- Unexpected process execution or system modifications
- Authentication bypass attempts
Network Indicators:
- HTTP traffic to Longwatch devices from unexpected sources
- GET requests with suspicious parameters or payloads
SIEM Query:
source="longwatch_device" AND (http_method="GET" AND (url_contains="/vulnerable_endpoint" OR parameters_contain="executable_payload"))