CVE-2023-39780
ASUS RT-AX55 Routers OS Command Injection Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 23 June 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
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.
- CVSS 3.1
- 8.8 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 37.70% probability · 98th percentile
- CISA KEV
- Listed 2 June 2025 · due 23 June 2025
- Weakness
- CWE-78
- Affected
- asus/rt-ax55 firmware
- Source
- cve@mitre.org
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://www.asus.com/networking-iot-servers/wifi-6/all-series/rt-ax55/helpdesk_bios/?model2Name=RT-AX55 ; https://www.asus.com/content/asus-product-security-advisory/ ; https://nvd.nist.gov/vuln/detail/CVE-2023-39780
References
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/1/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/2/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/3/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/4/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/5/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/6/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/1/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/2/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/3/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/4/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/5/EN.mdExploit, Third Party Advisory
- https://github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/6/EN.mdExploit, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-39780US Government Resource
- https://www.greynoise.io/blog/stealthy-backdoor-campaign-affecting-asus-routersExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.