CVE-2021-47796 — AI Deep Analysis Summary

Q: What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Hardcoded Telnet credentials in Denver SHC-150 cameras. 💥 **Consequences**: Unauthenticated attackers gain full **Linux Shell** access. Total device compromise.

Q: Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-798** (Use of Hard-coded Credentials). ❌ **Flaw**: Static Telnet passwords baked into the firmware. No dynamic auth mechanism.

Q: Who is affected? (Versions/Components)

📦 **Affected**: **Denver SHC-150** Indoor Smart Wifi Camera. 🌍 **Vendor**: Denver (Denmark). ⚠️ **Scope**: Specific model mentioned in advisory.

Q: What can hackers do? (Privileges/Data)

🔓 **Privileges**: Full **Linux Shell** access. 👁️ **Data**: High impact on Confidentiality, Integrity, and Availability (CVSS 3.1). 🕵️ **Action**: Remote Code Execution (RCE) possible.

Q: Is exploitation threshold high? (Auth/Config)

📉 **Threshold**: **LOW**. 🔑 **Auth**: **None** required. 🌐 **Network**: Attack vector is **Network** (AV:N). 🎯 **Complexity**: Low (AC:L).

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

💣 **Public Exp?**: **YES**. 📂 **ExploitDB**: ID **50160** available. 📢 **Advisory**: VulnCheck published details. 🔥 **Status**: Wild exploitation possible.

Q: How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for open **Telnet port** (23). 🧪 **Test**: Attempt login with known hardcoded credentials. 📡 **Tools**: Use Nmap or VulnCheck scanners to detect SHC-150 signatures.

Q: Is it fixed officially? (Patch/Mitigation)

🩹 **Official Fix**: Check **Denver Official Homepage** for firmware updates. 📅 **Note**: Data shows published date in 2026, implying recent disclosure. ✅ **Action**: Update firmware immediately if patch exists.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. 📈 **Priority**: **P1**. ⚡ **Reason**: CVSS High (H/H/H), No Auth needed, Public Exploit exists. 🏃 **Action**: Patch or mitigate **IMMEDIATELY**.

Updated May 06, 2026 CVSS 9.8 · Critical

This is a summary of the AI-generated 10-question deep analysis. The full version (longer answers, follow-up Q&A, related CVEs) requires login. Read the full analysis →

Q1What is this vulnerability? (Essence + Consequences)

🚨 **Essence**: Hardcoded Telnet credentials in Denver SHC-150 cameras. <br>💥 **Consequences**: Unauthenticated attackers gain full **Linux Shell** access. Total device compromise.

Q2Root Cause? (CWE/Flaw)

🛡️ **Root Cause**: **CWE-798** (Use of Hard-coded Credentials). <br>❌ **Flaw**: Static Telnet passwords baked into the firmware. No dynamic auth mechanism.

Q3Who is affected? (Versions/Components)

📦 **Affected**: **Denver SHC-150** Indoor Smart Wifi Camera. <br>🌍 **Vendor**: Denver (Denmark). <br>⚠️ **Scope**: Specific model mentioned in advisory.

Q4What can hackers do? (Privileges/Data)

🔓 **Privileges**: Full **Linux Shell** access. <br>👁️ **Data**: High impact on Confidentiality, Integrity, and Availability (CVSS 3.1). <br>🕵️ **Action**: Remote Code Execution (RCE) possible.

Q5Is exploitation threshold high? (Auth/Config)

📉 **Threshold**: **LOW**. <br>🔑 **Auth**: **None** required. <br>🌐 **Network**: Attack vector is **Network** (AV:N). <br>🎯 **Complexity**: Low (AC:L).

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

💣 **Public Exp?**: **YES**. <br>📂 **ExploitDB**: ID **50160** available. <br>📢 **Advisory**: VulnCheck published details. <br>🔥 **Status**: Wild exploitation possible.

Q7How to self-check? (Features/Scanning)

🔍 **Self-Check**: Scan for open **Telnet port** (23). <br>🧪 **Test**: Attempt login with known hardcoded credentials. <br>📡 **Tools**: Use Nmap or VulnCheck scanners to detect SHC-150 signatures.

Q8Is it fixed officially? (Patch/Mitigation)

🩹 **Official Fix**: Check **Denver Official Homepage** for firmware updates. <br>📅 **Note**: Data shows published date in 2026, implying recent disclosure. <br>✅ **Action**: Update firmware immediately if patch exists.

Q9What if no patch? (Workaround)

🚧 **No Patch?**: **Disable Telnet** service if configurable. <br>🔒 **Network**: Block port 23 at firewall. <br>🛑 **Isolate**: Segment IoT devices from critical networks.…

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Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. <br>📈 **Priority**: **P1**. <br>⚡ **Reason**: CVSS High (H/H/H), No Auth needed, Public Exploit exists. <br>🏃 **Action**: Patch or mitigate **IMMEDIATELY**.

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Vulnerability detail Full AI analysis (login) Denver CWE-798