What’s Vulnerable › Vulnerabilities

CVE-2021-31756

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-05-07 · updated 2026-06-17
• Weakness: CWE-787

Description

An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /gofrom/setwanType allows attackers to execute arbitrary code on the system via a crafted post request. This occurs when input vector controlled by malicious attack get copied to the stack variable.

Affected products

• Tenda Ac11 Firmware: through 02.03.01.104_cn

References

• https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_1
• https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_1

Get alerted when CVE-2021-31756 or the next vulnerability affects your stack