---
title: "CVE-2023-39780: ASUS RT-AX55 Routers OS Command Injection Vulnerability"
url: https://erroneo.us/security/cve/CVE-2023-39780/
description: "CVE-2023-39780 (ASUS RT-AX55 Routers): Exploited in the wild (CISA KEV). On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS…"
type: vulnerability-record
section: "Security Digest"
date_published: 2023-09-11
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2023-39780"
kev: true
cvss: 8.8
epss: 0.39514
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2023-39780: ASUS RT-AX55 Routers OS Command Injection Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run ASUS RT-AX55 Routers. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-06-02, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-06-23 ; treat that as the outer limit, not the target.
- EPSS 39.5% , percentile 99: FIRST’s model estimates a 39.5% chance of exploitation activity in the next 30 days, higher than 99% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Needs an account (low (any account)). Exposure depends on who can log in.

## What it is

On ASUS RT-AX55 3.0.0.4.386.51598 devices, authenticated attackers can perform OS command injection via the /startapply.htm qosbwrulelist 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.

## Affected products (CVE record)

- ASUS RT-AX55: 3.0.0.4.386.51598

## Severity

- mitre CVSS 3.1: 8.8 `CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: added 2025-06-02; federal due date 2025-06-23. Known ransomware use: Unknown.
- 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.
- CISA SSVC assessment: exploitation active , automatable no , technical impact total .
- FIRST EPSS (model of 2026-10-21): 39.51% probability of exploitation activity in the next 30 days; percentile 99.

## Sources

- [Listed in CISA KEV notes (asus.com)](https://www.asus.com/networking-iot-servers/wifi-6/all-series/rt-ax55/helpdesk_bios/?model2Name=RT-AX55)
- [Listed in CISA KEV notes (asus.com)](https://www.asus.com/content/asus-product-security-advisory/)
- [CVE.org record CVE-2023-39780](https://www.cve.org/CVERecord?id=CVE-2023-39780)
- [NVD entry CVE-2023-39780](https://nvd.nist.gov/vuln/detail/CVE-2023-39780)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-39780)
- [github.com](https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/1/EN.md)
- [github.com](https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/2/EN.md)
- [github.com](https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/3/EN.md)
- [github.com](https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/4/EN.md)
- [github.com](https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/5/EN.md)
- [github.com](https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/6/EN.md)
- [greynoise.io](https://www.greynoise.io/blog/stealthy-backdoor-campaign-affecting-asus-routers)

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Source page: https://erroneo.us/security/cve/CVE-2023-39780/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt