CVE-2025-15255 — AI Deep Analysis Summary

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

🚨 **Essence**: Stack Buffer Overflow in Tenda W6-S. 💥 **Consequences**: Remote Code Execution (RCE), full system compromise, data theft, and service disruption due to high CVSS score.

Q: Root Cause? (CWE/Flaw)

🛡️ **CWE**: CWE-121 (Stack-based Buffer Overflow). 🔍 **Flaw**: Improper handling of the `Cookie` parameter in `/bin/httpd` within the `R7websSsecurityHandler` component.

Q: Who is affected? (Versions/Components)

📦 **Vendor**: Tenda (China). 📱 **Product**: W6-S Wireless Access Point. 📅 **Affected Version**: Specifically **v1.0.0.4**.

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

👑 **Privileges**: Attacker gains **High** impact on Confidentiality, Integrity, and Availability. 🕵️ **Action**: Likely full remote code execution without authentication.

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

🔓 **Threshold**: **LOW**. 🌐 **Auth**: None required (PR:N). 📡 **Vector**: Network (AV:N). 🎯 **Complexity**: Low (AC:L). Easy to exploit remotely.

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

📜 **Exploit Status**: Yes. 🔗 **Reference**: GitHub PoC available (`dwBruijn/CVEs`). 📢 **VDB**: Listed in VulDB (ID 338645) with technical descriptions.

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

🔍 **Check**: Scan for Tenda W6-S devices running firmware **v1.0.0.4**. 📡 **Feature**: Look for HTTP requests targeting `/bin/httpd` with crafted Cookie headers.

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

🛠️ **Patch**: Official patch info not explicitly detailed in the snippet, but vendor (Tenda) is identified. 📝 **Action**: Check Tenda official site for firmware updates immediately.

Q: What if no patch? (Workaround)

🚧 **Workaround**: If no patch, **disable remote management** or block external access to the device's HTTP interface. 🛑 **Mitigate**: Isolate the device on a segmented network.

Q: Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. 📈 **Priority**: Immediate action required. CVSS is High (likely 9.8+), no auth needed, and public exploits exist. Patch or isolate NOW.

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**: Stack Buffer Overflow in Tenda W6-S. 💥 **Consequences**: Remote Code Execution (RCE), full system compromise, data theft, and service disruption due to high CVSS score.

Q2Root Cause? (CWE/Flaw)

🛡️ **CWE**: CWE-121 (Stack-based Buffer Overflow). 🔍 **Flaw**: Improper handling of the `Cookie` parameter in `/bin/httpd` within the `R7websSsecurityHandler` component.

Q3Who is affected? (Versions/Components)

📦 **Vendor**: Tenda (China). 📱 **Product**: W6-S Wireless Access Point. 📅 **Affected Version**: Specifically **v1.0.0.4**.

Q4What can hackers do? (Privileges/Data)

👑 **Privileges**: Attacker gains **High** impact on Confidentiality, Integrity, and Availability. 🕵️ **Action**: Likely full remote code execution without authentication.

Q5Is exploitation threshold high? (Auth/Config)

🔓 **Threshold**: **LOW**. 🌐 **Auth**: None required (PR:N). 📡 **Vector**: Network (AV:N). 🎯 **Complexity**: Low (AC:L). Easy to exploit remotely.

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

📜 **Exploit Status**: Yes. 🔗 **Reference**: GitHub PoC available (`dwBruijn/CVEs`). 📢 **VDB**: Listed in VulDB (ID 338645) with technical descriptions.

Q7How to self-check? (Features/Scanning)

🔍 **Check**: Scan for Tenda W6-S devices running firmware **v1.0.0.4**. 📡 **Feature**: Look for HTTP requests targeting `/bin/httpd` with crafted Cookie headers.

Q8Is it fixed officially? (Patch/Mitigation)

🛠️ **Patch**: Official patch info not explicitly detailed in the snippet, but vendor (Tenda) is identified. 📝 **Action**: Check Tenda official site for firmware updates immediately.

Q9What if no patch? (Workaround)

🚧 **Workaround**: If no patch, **disable remote management** or block external access to the device's HTTP interface. 🛑 **Mitigate**: Isolate the device on a segmented network.

Q10Is it urgent? (Priority Suggestion)

🔥 **Urgency**: **CRITICAL**. 📈 **Priority**: Immediate action required. CVSS is High (likely 9.8+), no auth needed, and public exploits exist. Patch or isolate NOW.

Continue exploring

Vulnerability detail Full AI analysis (login) Tenda CWE-121