CVE-2020-25367: dlink dir-823g_firmware OS Command Injection

Vulnerability summary

CVE-2020-25367 is a critical (CVSS 9.8) OS Command Injection vulnerability in dlink dir-823g_firmware. EPSS estimates a 8.65% chance of exploitation in the next 30 days, higher than 95% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 04-11-2021
   PublishedVulnerability first disclosed.
2. 09-07-2026
   Last modifiedVulnerability information updated.

Description

A command injection vulnerability was discovered in the HNAP1 protocol in D-Link DIR-823G devices with firmware V1.0.2B05. An attacker is able to execute arbitrary web scripts via shell metacharacters in the Captcha field to Login.

• CWE-78Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.