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
- 39.51% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 2 June 2025 · due 23 June 2025
- Weakness
- CWE-78
- Affected
- asus/rt-ax55 firmware
- Source
- cve@mitre.org
EPSS 39.5% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
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, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.