SARA / Free Tools / KEV / CVE-2023-39780

CVE-2023-39780 on CISA KEV

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&q

CISA KEV — Actively Exploited

ASUS RT-AX55 Routers OS Command Injection Vulnerability

Vendor / Product
— / ASUS / RT-AX55 Routers
Added to KEV
2025-06-02
BOD 22-01 due
2025-06-23
Ransomware use
Unknown
CVSS / EPSS
8.8 HIGH · EPSS 42.66%

01What CISA says about this vulnerability

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…

02Required action — verbatim from CISA

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

03Notes & references

04SARA's analyst layer — why this matters

This vulnerability is currently on the CISA KEV list, which CISA only adds CVEs to when there is reliable evidence of active exploitation in the wild. For federal civilian agencies, BOD 22-01 requires remediation by the due date above. For everyone else, KEV is the strongest "patch immediately" signal you can get from public threat intel.

05Affected products (summary)

VendorProductVersions
ASUSRTAX55 — 3.0.0.4.386.51598

06Detection

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection:

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