CVE-2020-13394

Name: CVE-2020-13394
Creator: NVD / NIST
Published: 2020-05-22T17:15:11.363+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 2.55%

Last modified Jun 17, 2026

CVE-2020-13394 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0 V15.03.05.19(6318)_CN, AC9 V3.0 V15.03.06.42_multi, AC15 V1.0 V15.03.05.19_multi_TD01, and AC18 V15.03.05.19(6318_)_CN devices. There is a buffer overflow vulnerability in the router's web server -- httpd. EPSS estimates a 2.55% chance of exploitation in the next 30 days.

Description

An issue was discovered on Tenda AC6 V1.0 V15.03.05.19_multi_TD01, AC9 V1.0 V15.03.05.19(6318)_CN, AC9 V3.0 V15.03.06.42_multi, AC15 V1.0 V15.03.05.19_multi_TD01, and AC18 V15.03.05.19(6318_)_CN devices. There is a buffer overflow vulnerability in the router's web server -- httpd. While processing the /goform/SetNetControlList list parameter for a POST request, a value is directly used in a strcpy to a local variable placed on the stack, which overwrites the return address of a function. An attacker can construct a payload to carry out arbitrary code execution attacks.

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

2.55%

83.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-120

Affected Software

Vendor	Product	Versions
Tendacn	Ac6 Firmware	v15.03.05.19_multi_td01
Tendacn	Ac9 Firmware	v15.03.05.19\(6318\)
Tendacn	Ac15 Firmware	v15.03.05.19_multi_td01
Tendacn	Ac18 Firmware	v15.03.05.19\(6318\)
Tendacn	Ac9 Firmware	v15.03.06.42_multi

References

https://joel-malwarebenchmark.github.ioExploit, Third Party Advisory
https://joel-malwarebenchmark.github.io/blog/2020/04/28/cve-2020-13394-Tenda-vulnerability/Exploit, Third Party Advisory
https://joel-malwarebenchmark.github.ioExploit, Third Party Advisory
https://joel-malwarebenchmark.github.io/blog/2020/04/28/cve-2020-13394-Tenda-vulnerability/Exploit, Third Party Advisory

Timeline

Published: May 22, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-13394?

How severe is CVE-2020-13394?

CVE-2020-13394 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 2.55% probability of exploitation in the next 30 days.

How do I fix CVE-2020-13394?

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-2020-13394?

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

Scan your code now

Source: NVD / NIST