CVE-2020-25506: D-Link DNS-320 Device Command Injection Vulnerability

Vulnerability summary

CVE-2020-25506 is a critical (CVSS 9.8) OS Command Injection vulnerability in D-Link DNS-320 Device. It is known to be exploited: CISA lists it, first on 03-11-2021. EPSS estimates a 99.97% chance of exploitation in the next 30 days, higher than 99.9% of scored vulnerabilities. 1 public exploit is recorded.

Timeline

1. 02-02-2021
   PublishedVulnerability first disclosed.
2. 03-11-2021
   Added to CISA KEVD-Link DNS-320 Device Command Injection Vulnerability
3. 03-05-2022
   CISA remediation dueApply updates per vendor instructions.
4. 21-10-2025
   Last modifiedVulnerability information updated.

Description

D-Link DNS-320 FW v2.06B01 Revision Ax is affected by command injection in the system_mgr.cgi component, which can lead to remote arbitrary code execution.

• 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.