---
id: "CVE-2021-40655"
kind: "vulnerability"
aliases: ["CVE-2021-40655"]
title: "dlink dir-605l firmware: An informtion disclosure issue exists in D-LINK-DIR-605 B2 Firmware Version : 2.01MT"
severity: "high"
cvss: 7.5
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "D-Link DIR-605 Router", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "dlink dir-605l firmware", "fixed": [], "affected": "= 2.01mt", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["d-link", "dir-605", "exploited", "infrastructure", "routers", "self-hosted"]
not_affected_if: ["no-dir-605-in-use"]
published_at: "2021-09-24T21:15:07+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T22:29:05+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-40655", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-40655", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# dlink dir-605l firmware: An informtion disclosure issue exists in D-LINK-DIR-605 B2 Firmware Version : 2.01MT

The D-Link DIR-605 router exposes its stored username and password through a forged POST request to /getcfg.php. An attacker who can reach the router can read the admin credentials and log in.

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

## Affected

- vendor:D-Link DIR-605 Router affected ? fixed ?
- vendor:dlink dir-605l firmware affected = 2.01mt fixed ?

## How to check

Check whether any DIR-605 router is on your network or internet-facing, and confirm the model and hardware revision on its label or admin page.

## Fix

Retire and replace the device, since all DIR-605 hardware revisions are end-of-life and no vendor fix is stated in the sources.
Change the router's admin password if it cannot be replaced immediately.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2021-40655
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2021-40655

## From the sources

D-Link DIR-605 routers contain an information disclosure vulnerability that allows attackers to obtain a username and password by forging a post request to the /getcfg.php page.

CISA required action: This vulnerability affects legacy D-Link products. All associated hardware revisions have reached their end-of-life (EOL) or end-of-service (EOS) life cycle and should be retired and replaced 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_