CVE-2020-20746

Name: CVE-2020-20746
Creator: NVD / NIST
Published: 2021-09-30T21:15:07.96+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.2/10EPSS 2.81%

Last modified Jun 17, 2026

CVE-2020-20746 is a high-severity vulnerability rated 7.2/10 on the CVSS scale. A stack-based buffer overflow in the httpd server on Tenda AC9 V15.03.06.60_EN allows remote attackers to execute arbitrary code or cause a denial of service (DoS) via a crafted POST request to /goform/SetStaticRouteCfg.. EPSS estimates a 2.81% chance of exploitation in the next 30 days.

Description

A stack-based buffer overflow in the httpd server on Tenda AC9 V15.03.06.60_EN allows remote attackers to execute arbitrary code or cause a denial of service (DoS) via a crafted POST request to /goform/SetStaticRouteCfg.

Metrics

CVSS 3.1

7.2/10

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

EPSS Probability

2.81%

84.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Tendacn	Ac9 Firmware	15.03.06.60_en

References

https://cwe.mitre.org/data/definitions/121.htmlTechnical Description
https://github.com/grapefruitvul/vulinfo/blob/master/tenda/vul1.mdExploit, Third Party Advisory
https://cwe.mitre.org/data/definitions/121.htmlTechnical Description
https://github.com/grapefruitvul/vulinfo/blob/master/tenda/vul1.mdExploit, Third Party Advisory

Timeline

Published: Sep 30, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-20746?

How severe is CVE-2020-20746?

CVE-2020-20746 has a CVSS score of 7.2/10 (HIGH severity). The EPSS model estimates a 2.81% probability of exploitation in the next 30 days.

How do I fix CVE-2020-20746?

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-2020-20746?

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

Scan your code now

Source: NVD / NIST