---
id: "CVE-2023-39780"
kind: "vulnerability"
aliases: ["CVE-2023-39780"]
title: "asus rt-ax55 firmware: On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command injection via the\u2026"
severity: "high"
cvss: 8.8
epss: null
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "ASUS RT-AX55 Routers", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "asus rt-ax55 firmware", "fixed": [], "affected": "= 3.0.0.4.386.51598", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["asus", "exploited", "infrastructure", "routers", "rt-ax55", "self-hosted"]
not_affected_if: ["no-rt-ax55-in-use"]
published_at: "2023-09-11T19:15:43+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-2023-39780", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-39780", "first_seen_at": "2026-10-23T22:29:05+00:00"}]
---

# asus rt-ax55 firmware: On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command injection via the…

ASUS RT-AX55 routers contain an OS command injection flaw that lets a remote attacker run arbitrary commands on the device. The sources say the attacker must be authenticated, and CISA lists it as actively exploited.

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

## Affected

- vendor:ASUS RT-AX55 Routers affected ? fixed ?
- vendor:asus rt-ax55 firmware affected = 3.0.0.4.386.51598 fixed ?

## Fix

Apply the mitigation from the vendor per CISA guidance, or discontinue use of the router if no mitigation is available. Specific firmware version not stated in sources.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2023-39780
- 2026-10-23T22:29:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2023-39780

## From the sources

On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command injection via the /start_apply.htm qos_bw_rulelist parameter. NOTE: for the similar "token-generated module" issue, see CVE-2023-41345; for the similar "token-refresh module" issue, see CVE-2023-41346; for the similar "check token module" issue, see CVE-2023-41347; and for the similar "code-authentication module" issue, see CVE-2023-41348.

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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_