Question 1

What is this vulnerability? (Essence + Consequences)

Accepted Answer

🚨 **Essence**: OS Command Injection in TOTOLINK A7100RU.
💥 **Consequences**: Attackers can execute arbitrary system commands. This leads to total device compromise, data theft, and network disruption.

Question 2

Root Cause? (CWE/Flaw)

Accepted Answer

🛡️ **Root Cause**: CWE-78 (OS Command Injection).
🔍 **Flaw**: The `setRadvdCfg` function in `/cgi-bin/cstecgi.cgi` mishandles the `maxRadvdInterval` parameter.…

Question 3

Who is affected? (Versions/Components)

Accepted Answer

📦 **Affected Product**: TOTOLINK A7100RU Wireless Router.
📌 **Specific Version**: 7.4cu.2313_b20191024.
🏢 **Vendor**: TOTOLINK (China Jicong Electronics).

Question 4

What can hackers do? (Privileges/Data)

Accepted Answer

👑 **Privileges**: Full System Control.
📊 **Impact**: High (CVSS H/I/A). Hackers gain Root-level access. They can read sensitive configs, install backdoors, or pivot attacks to the entire local network.

Question 5

Is exploitation threshold high? (Auth/Config)

Accepted Answer

⚡ **Threshold**: LOW.
🔓 **Auth**: None required (PR:N).
🌐 **Access**: Network accessible (AV:N).
🎯 **Complexity**: Low (AC:L). No user interaction needed (UI:N). Easy to exploit remotely.

Question 6

Is there a public Exp? (PoC/Wild Exploitation)

Accepted Answer

💻 **Public Exploit**: YES.
📂 **Evidence**: GitHub PoC available (Litengzheng/vuldb_new).
🔗 **Details**: Technical descriptions and IOCs are listed in VDB-356972.…

Question 7

How to self-check? (Features/Scanning)

Accepted Answer

🔍 **Self-Check**: Scan for `/cgi-bin/cstecgi.cgi`.
🧪 **Test**: Send crafted requests to the `setRadvdCfg` endpoint with malicious `maxRadvdInterval` values.…

Question 8

Is it fixed officially? (Patch/Mitigation)

Accepted Answer

🩹 **Official Fix**: Check vendor site (totolink.net).
⚠️ **Status**: Data shows published date 2026-04-12. Assume patch is pending or requires manual update to latest firmware. Verify with vendor directly.

Question 9

What if no patch? (Workaround)

Accepted Answer

🚧 **Workaround**: Block external access to the router's management interface.
🛑 **Mitigation**: Disable remote management features. If possible, restrict CGI access via firewall rules.…

Question 10

Is it urgent? (Priority Suggestion)

Accepted Answer

🔥 **Urgency**: CRITICAL.
🚨 **Priority**: Immediate Action.
📉 **Risk**: CVSS 9.8 (High). Remote, unauthenticated, easy exploit. Patch immediately or isolate the device to prevent total network compromise.

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CVE-2026-6112 — AI Deep Analysis Summary

Q1What is this vulnerability? (Essence + Consequences)

Q2Root Cause? (CWE/Flaw)

Q3Who is affected? (Versions/Components)

Q4What can hackers do? (Privileges/Data)

Q5Is exploitation threshold high? (Auth/Config)

Q6Is there a public Exp? (PoC/Wild Exploitation)

Q7How to self-check? (Features/Scanning)

Q8Is it fixed officially? (Patch/Mitigation)

Q9What if no patch? (Workaround)

Q10Is it urgent? (Priority Suggestion)

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