CVE-2018-14558: in the CISA KEV catalogue
Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability. CISA added CVE-2018-14558 to the Known Exploited Vulnerabilities catalogue on 2021-11-03 with a default due date of 2022-05-03. Known ransomware campaign use: Unknown. Forensic triage flag: No.
Tenda AC7, AC9, and AC10 devices contain a command injection vulnerability due to the "formsetUsbUnload" function executes a dosystemCmd function with untrusted input. Successful exploitation allows an attacker to execute OS commands via a crafted goform/setUsbUnload request. (CISA description)
- Vendor / product
- Tenda AC7, AC9, and AC10 Routers
- CWE
- CWE-78
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 8.5%, percentile 95 (scored 2026-11-03)
EPSS puts about 8.5 in 100 odds (8.5%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 95% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2018-14558 in the CISA KEV catalogue?
Yes. CISA added CVE-2018-14558 (Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2021-11-03. CISA's default due date for it is 2022-05-03.
Is CVE-2018-14558 used in ransomware attacks?
CISA marks known ransomware campaign use as Unknown for CVE-2018-14558. That means CISA lacks confirmation, not that ransomware groups do not use it.
What should I do about CVE-2018-14558?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2018-14558