---
id: "CVE-2023-33538"
kind: "vulnerability"
aliases: ["CVE-2023-33538"]
title: "TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a command injection\u2026"
severity: "high"
cvss: 8.8
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "TP-Link Multiple Routers", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "tp-link tl-wr940n firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "tp-link tl-wr841n firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "tp-link tl-wr740n firmware", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "infrastructure", "routers", "self-hosted", "tp-link"]
not_affected_if: ["no-affected-router-in-use", "unaffected-models"]
published_at: "2023-06-07T04:15:10+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-2023-33538", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-33538", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 was discovered to contain a command injection…

TP-Link TL-WR940N, TL-WR841N and TL-WR740N home routers have a command injection flaw in the /userRpm/WlanNetworkRpm web component. An attacker who can reach the router's web interface can run operating system commands on the device.

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

## Affected

- vendor:TP-Link Multiple Routers affected ? fixed ?
- vendor:tp-link tl-wr940n firmware affected ? fixed ?
- vendor:tp-link tl-wr841n firmware affected ? fixed ?
- vendor:tp-link tl-wr740n firmware affected ? fixed ?

## How to check

Identify any TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10 or TL-WR740N V1/V2 in use, including on branch or remote sites.

## Fix

Discontinue use of the affected models, since the sources say they are end-of-life and no fix is given; if replacement is not possible, follow CISA's instruction to apply vendor mitigations.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-33538
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-33538

## From the sources

TP-Link TL-WR940N V2/V4, TL-WR841N V8/V10, and TL-WR740N V1/V2 contain a command injection vulnerability via the component /userRpm/WlanNetworkRpm. The impacted products could be end-of-life (EoL) and/or end-of-service (EoS). Users should discontinue product utilization.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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