CVE-2026-3943
📋 TL;DR
This vulnerability allows remote attackers to execute arbitrary commands on H3C ACG1000-AK230 devices by manipulating the suffix parameter in the /webui/?aaa_portal_auth_local_submit endpoint. It affects all versions up to February 27, 2026, potentially enabling complete system compromise. Organizations using these devices for network security or access control are at risk.
💻 Affected Systems
- H3C ACG1000-AK230
⚠️ 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
Full system compromise allowing attacker to install persistent backdoors, steal credentials, pivot to internal networks, and disrupt network operations.
Likely Case
Unauthorized command execution leading to data exfiltration, lateral movement, or deployment of ransomware/malware.
If Mitigated
Limited impact if network segmentation, strict firewall rules, and monitoring prevent exploitation attempts.
🎯 Exploit Status
Exploit details are publicly available on GitHub. Remote exploitation requires no authentication.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Contact H3C support for updates. Consider workarounds or replacement.
🔧 Temporary Workarounds
Block Web Interface Access
linuxRestrict access to the vulnerable web interface endpoint using firewall rules or network segmentation.
iptables -A INPUT -p tcp --dport 80 -j DROP
iptables -A INPUT -p tcp --dport 443 -j DROP
Disable Web Management Interface
allIf possible, disable the web management interface and use CLI/console management only.
system-view
undo web-management enable
🧯 If You Can't Patch
- Isolate affected devices in a dedicated VLAN with strict firewall rules
- Implement network monitoring and IDS/IPS rules to detect exploitation attempts
🔍 How to Verify
Check if Vulnerable:
Check device version via CLI: display version. If version date is 20260227 or earlier, device is vulnerable.Check Version:
display versionVerify Fix Applied:
No official fix available. Verify workarounds by testing if /webui/?aaa_portal_auth_local_submit endpoint is inaccessible.📡 Detection & Monitoring
Log Indicators:
- Unusual commands in system logs
- Multiple failed authentication attempts to web interface
- Suspicious process execution
Network Indicators:
- HTTP POST requests to /webui/?aaa_portal_auth_local_submit with unusual suffix parameters
- Outbound connections from device to unknown IPs
SIEM Query:
source="ACG1000" AND (url="/webui/?aaa_portal_auth_local_submit" OR cmd="*;*" OR cmd="*|*")