CVE-2018-14558 Tenda AC7, AC9, and AC10 Routers: command or code injection
In plain words: The program treats text it receives as instructions instead of plain data. The attacker can run commands on the machine — often the whole device is taken over.
Confirmed exploited by CISA on · US federal patch deadline May 3, 2022
What to do
- Install Tenda's security update for AC7, AC9, and AC10 Routers. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Turn on automatic firmware updates and replace gear the maker no longer supports.
- Change default passwords and switch off remote administration and features you do not use.
- Do not put storage boxes or cameras directly on the internet — use the maker's app or a VPN.
Who is affected
Could reach you. This one is aimed at devices or apps of the kind people own.
What's at risk: Taken over in bulk to join botnets, used to watch your traffic, or — for storage boxes — locked by ransomware.
The details
- Official name
- Tenda AC7, AC9, and AC10 Routers Command Injection Vulnerability
- Product
- Tenda AC7, AC9, and AC10 Routers
- CISA description
- 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.
- Type of flaw
- Command or code injection (CWE-78)
- Confirmed exploited
- Nov 3, 2021
- US federal patch deadline
- May 3, 2022
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Answering about CVE-2018-14558 ·
Questions about CVE-2018-14558
Is CVE-2018-14558 being exploited?
Yes. CISA added CVE-2018-14558 to its Known Exploited Vulnerabilities catalog on Nov 3, 2021, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2018-14558?
Install Tenda's security update for AC7, AC9, and AC10 Routers. If no update exists, follow the vendor's workaround or stop using the product until one ships. Turn on automatic firmware updates and replace gear the maker no longer supports.
Am I affected by CVE-2018-14558?
Only if you use Tenda AC7, AC9, and AC10 Routers. This one is aimed at devices or apps of the kind people own.