Is CVE-2020-13389 actively exploited?

No active exploitation of CVE-2020-13389 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2020-13389 be exploited remotely?

Yes. CVE-2020-13389 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2020-13389?

CVE-2020-13389 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2020-13389

CRITICAL

CVE-2020-13389

CWE-120Published: May 22, 2020· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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/openSchedWifi schedStartTime and schedEndTime parameters 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.

NVD Source

Technical Analysis

CVE-2020-13389 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.