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

Source: https://junglewise.ai/threats/cve-2020-25506-d-link-dns-320-device-command-injection-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2021-11-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2020-25506 · Severity: critical · CVSS 9.8 · Exploited in the wild · Published 2021-11-03

The D-Link DNS-320 device contains an OS command injection vulnerability in the system_mgr.cgi component. Remote attackers can exploit this flaw to execute arbitrary code on the affected device without authentication.

Vendors: [D-Link](https://junglewise.ai/threats/vendors/d-link).

## Quick answers

**Is CVE-2020-25506 exploited in the wild?** Yes. CVE-2020-25506 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.

**How severe is CVE-2020-25506?** Critical severity, with a CVSS score of 9.8, published 3 November 2021.

**Which products and versions are affected?** D-Link DNS-320 Firmware 2.06B01 Revision Ax.

**Is there a fix for CVE-2020-25506?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2020-25506 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2020-25506?** Check whether you run D-Link Dns-320 Device. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- D-Link DNS-320 Firmware 2.06B01 Revision Ax

## Timeline

- 2021-02-02: disclosed: NVD Published Date
- 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2021-11-03: advisory: External advisory publication date