CVE-2025-46583
📋 TL;DR
A Denial of Service vulnerability exists in ZTE MC889A Pro devices due to insufficient input validation in the SMS interface. Attackers can exploit this to cause service disruption by sending specially crafted SMS messages. This affects organizations using ZTE MC889A Pro devices in their networks.
💻 Affected Systems
- ZTE MC889A Pro
⚠️ 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 service disruption of the affected ZTE MC889A Pro device, rendering it unavailable for legitimate users and potentially affecting dependent services.
Likely Case
Temporary service degradation or device reboot, causing intermittent connectivity issues for users relying on the device.
If Mitigated
Minimal impact with proper network segmentation and monitoring, allowing quick detection and response to attack attempts.
🎯 Exploit Status
Exploitation requires access to send SMS messages to the vulnerable interface. No public exploit code is currently available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched version
Vendor Advisory: https://support.zte.com.cn/zte-iccp-isupport-webui/bulletin/detail/2594779029512220894
Restart Required: No
Instructions:
1. Check the ZTE security advisory for patch availability. 2. Download the firmware update from ZTE support portal. 3. Apply the firmware update following ZTE's installation instructions. 4. Verify the update was successful.
🔧 Temporary Workarounds
Disable SMS Interface
allTemporarily disable the SMS interface if not required for operations
Check device configuration guide for SMS interface disable commands
Network Segmentation
allRestrict access to the SMS interface using firewall rules
Configure firewall to block external access to SMS service ports
🧯 If You Can't Patch
- Implement strict network access controls to limit who can send SMS messages to the device
- Monitor SMS interface traffic for unusual patterns and implement rate limiting
🔍 How to Verify
Check if Vulnerable:
Check device firmware version against patched versions listed in ZTE advisoryCheck Version:
Check device web interface or CLI for firmware version informationVerify Fix Applied:
Verify firmware version matches or exceeds patched version from ZTE advisory📡 Detection & Monitoring
Log Indicators:
- Unusual SMS message volumes
- Device reboot events
- SMS interface error messages
Network Indicators:
- High volume of SMS traffic to device
- Unusual SMS message patterns
SIEM Query:
Search for SMS interface access logs showing abnormal message patterns or error rates