CVE-2020-21016: dlink dir-846_firmware Code Injection

Vulnerability summary

CVE-2020-21016 is a critical (CVSS 9.8) Code Injection vulnerability in dlink dir-846_firmware. EPSS estimates a 2.22% chance of exploitation in the next 30 days, higher than 82.4% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 31-10-2022
   PublishedVulnerability first disclosed.
2. 07-05-2025
   Last modifiedVulnerability information updated.

Description

D-Link DIR-846 devices with firmware 100A35 allow remote attackers to execute arbitrary code as root via HNAP1/control/SetGuestWLanSettings.php.

• CWE-94Improper Control of Generation of Code ('Code Injection')The product constructs all or part of a code segment using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the syntax or behavior of the intended code segment.