Known exploited vulnerability
CVE-2023-39780
The short answer
CVE-2023-39780 affects ASUS RT-AX55 and is rated high (CVSS 8.8). CISA added it to the Known Exploited Vulnerabilities catalog on 2025-06-02: attackers are using it, so patch it first.
What it is
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.
Weakness: CWE-78.
Severity
8.8 high
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Jun 2, 2025
Federal due date Jun 23, 2025
EPSS, next 30 days
40%
Higher than 99% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Affected products
RT-AX55, rt-ax55. NVD's record lists the exact affected versions.
References
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/1/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/2/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/3/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/4/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/5/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/6/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/1/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/2/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/3/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/4/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/5/EN.md ExploitThird Party Advisory
- github.com/D2y6p/CVE/blob/main/asus/CVE-2023-39780/6/EN.md ExploitThird Party Advisory
Questions
Is CVE-2023-39780 being exploited?
Yes. CISA added CVE-2023-39780 to its Known Exploited Vulnerabilities catalog on 2025-06-02, with a federal remediation due date of 2025-06-23.
How do I fix CVE-2023-39780?
CISA's 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.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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