---
id: "CVE-2020-25506"
kind: "vulnerability"
aliases: ["CVE-2020-25506"]
title: "D-Link DNS-320 Device: D-Link DNS-320 Device Command Injection Vulnerability"
severity: "critical"
cvss: 9.8
epss: 0.99968
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "D-Link DNS-320 Device", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["d-link", "dns-320", "exploited", "infrastructure", "nas", "self-hosted"]
not_affected_if: ["no-dns-320-device"]
published_at: "2021-02-02T13:15:12+00:00"
first_seen_at: "2026-10-23T19:11:53+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-25506", "first_seen_at": "2026-10-23T19:11:53+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2020-25506", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2020-25506", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

# D-Link DNS-320 Device: D-Link DNS-320 Device Command Injection Vulnerability

The D-Link DNS-320 network storage device has a command injection flaw in its sytem_mgr.cgi component. An attacker can send crafted input to run arbitrary commands on the device.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:D-Link DNS-320 Device affected ? fixed ?

## Fix

Apply updates per vendor instructions; the sources do not name a fixed firmware version.

## Timeline

- 2026-10-23T19:11:53+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2020-25506
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2020-25506
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2020-25506

## From the sources

D-Link DNS-320 device contains a command injection vulnerability in the sytem_mgr.cgi component that may allow for remote code execution.

CISA required action: Apply updates per vendor instructions.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_