CVE-2026-0792
📋 TL;DR
This vulnerability allows unauthenticated remote attackers to execute arbitrary code on ALGO 8180 IP Audio Alerter devices by sending specially crafted SIP INVITE requests with malicious Alert-Info headers. The buffer overflow occurs due to insufficient length validation when processing SIP messages. Organizations using these devices for emergency notification or audio alerting systems are affected.
💻 Affected Systems
- ALGO 8180 IP Audio Alerter
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device compromise allowing attacker to install persistent backdoors, disrupt emergency notification systems, pivot to internal networks, or use device as part of botnet.
Likely Case
Device takeover leading to service disruption, unauthorized audio broadcasts, credential theft, or lateral movement within network.
If Mitigated
Limited impact with proper network segmentation and monitoring, potentially only denial of service if exploit fails.
🎯 Exploit Status
ZDI published advisory suggests exploit development is straightforward. Unauthenticated nature and stack buffer overflow make weaponization likely.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor advisory for specific patched firmware version
Vendor Advisory: https://www.zerodayinitiative.com/advisories/ZDI-26-014/
Restart Required: Yes
Instructions:
1. Check current firmware version on device. 2. Download latest firmware from ALGO vendor portal. 3. Upload firmware to device via web interface. 4. Apply update and restart device. 5. Verify update completed successfully.
🔧 Temporary Workarounds
Network Segmentation
allIsolate ALGO devices in separate VLAN with strict firewall rules limiting SIP traffic to authorized sources only.
SIP Traffic Filtering
allDeploy network IPS/IDS to detect and block malicious SIP INVITE packets with long Alert-Info headers.
🧯 If You Can't Patch
- Remove internet exposure immediately - ensure devices are not accessible from internet
- Implement strict network ACLs allowing SIP traffic only from authorized PBX/communication servers
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface and compare against vendor's patched version list.Check Version:
Login to device web interface and navigate to System > Firmware or similar menuVerify Fix Applied:
After patching, verify firmware version shows patched version. Consider safe vulnerability testing if available.📡 Detection & Monitoring
Log Indicators:
- Unusual SIP INVITE requests with long Alert-Info headers
- Device crash/restart logs
- Failed authentication attempts on device
Network Indicators:
- SIP INVITE packets with Alert-Info header exceeding normal length (typically > 256 bytes)
- Traffic to device SIP port from unexpected sources
SIEM Query:
sourcetype=network_traffic dest_port=5060 (sip_method="INVITE" AND alert_info_length>256)