CVE-2021-31758

Name: CVE-2021-31758
Creator: NVD / NIST
Published: 2021-05-07T23:15:07.137+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 6.62%

Last modified Jun 17, 2026

CVE-2021-31758 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setportList allows attackers to execute arbitrary code on the system via a crafted post request.. EPSS estimates a 6.62% chance of exploitation in the next 30 days.

Description

An issue was discovered on Tenda AC11 devices with firmware through 02.03.01.104_CN. A stack buffer overflow vulnerability in /goform/setportList allows attackers to execute arbitrary code on the system via a crafted post request.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

6.62%

93.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Tenda	Ac11 Firmware	<= 02.03.01.104_cn

References

https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_2Exploit, Issue Tracking, Third Party Advisory
https://github.com/Yu3H0/IoT_CVE/tree/main/Tenda/CVE_2Exploit, Issue Tracking, Third Party Advisory

Timeline

Published: May 7, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31758?

How severe is CVE-2021-31758?

CVE-2021-31758 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 6.62% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31758?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-31758?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST