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Exploited vulnerability · CISA KEV

Is CVE-2023-39780 exploited? Yes: in CISA KEV since 2 Jun 2025

Gociux · ASUS RT-AX55 Routers · data: CISA KEV, CVE record, FIRST EPSS

Yes. CVE-2023-39780, ASUS RT-AX55 Routers OS Command Injection Vulnerability, is being exploited in the wild. CISA added it to its Known Exploited Vulnerabilities catalog on 2 Jun 2025, 630 days after it was published. It affects ASUS RT-AX55 Routers. If you run it, CISA's required action is: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

exploitedYesCISA KEV · 2 Jun 2025
ransomwareNot knownno confirmed use
EPSStop 5%very likely to be exploited
severity8.8CVSS 3.1 · high
US federal due23 Jun 2025BOD 22-01 deadline

What it is

ASUS RT-AX55 devices contain an OS command injection vulnerability that could allow a remote, authenticated attacker to execute arbitrary commands. As represented by CVE-2023-41346.

VendorASUS (3 exploited CVEs in KEV)
ProductRT-AX55 Routers
VulnerabilityASUS RT-AX55 Routers OS Command Injection Vulnerability
WeaknessCWE-78
Published11 Sep 2023
Added to KEV2 Jun 2025
Reported by (CNA)mitre

What to do

  1. Check whether you run it. Look for RT-AX55 Routers in your asset inventory, including appliances and cloud images. Stack check lists every exploited ASUS CVE at once.
  2. Apply the fix. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
  3. If you can't patch today, take the affected service off the internet or restrict who can reach it, and check its logs for signs of compromise since 11 Sep 2023.
  4. Get told next time. Email alerts when CISA adds a CVE for ASUS.

References

Questions

Is CVE-2023-39780 being exploited?

Yes. CISA added CVE-2023-39780 to the Known Exploited Vulnerabilities catalog on 2 Jun 2025, which means there is reliable evidence of exploitation in the wild.

Is CVE-2023-39780 used in ransomware attacks?

CISA does not list known ransomware use for it. That can change, and exploitation alone is reason to fix it first.

How do I fix CVE-2023-39780?

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. Check ASUS's advisory for the fixed versions, and if you can't patch quickly, restrict access to the affected RT-AX55 Routers and watch it for signs of compromise.

Sources: CISA KEV (exploitation, ransomware use, required action, due date), the CVE record (publication date, CVSS, CNA), NVD and FIRST EPSS (live score). More: all KEV additions in June 2025 · ASUS scorecard · act-now radar.

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