CVE-2023-39780

HIGH8.8

CISA KEV

Published 2023-09-11 · Updated 2026-06-17 · Source cve@mitre.org

Summary

CVE-2023-39780 is a high-severity (CVSS 8.8) vulnerability in ASUS RT-AX55 Routers. CISA added it to the Known Exploited Vulnerabilities catalog on June 2, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 23, 2025. CISA does not currently list it as used in ransomware campaigns. ASUS has 3 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

All 3 known-exploited ASUS vulnerabilities →

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 vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE-78CWE-78

CISA Known-Exploited Vulnerability

Product: ASUS — RT-AX55 Routers

Name: ASUS RT-AX55 Routers OS Command Injection Vulnerability

Date added: 2025-06-02 · Due: 2025-06-23

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.

References

View on NVD

More exploited ASUS vulnerabilities

Most recently added to CISA KEV

CVE-2025-59374
Live Update — ASUS Live Update Embedded Malicious Code Vulnerability
added 2025-12-17
CVE-2021-32030
Routers — ASUS Routers Improper Authentication Vulnerability
added 2025-06-02

View all →

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