CVE-2022-30525 Zyxel Multiple Firewalls: 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 Jun 6, 2022
What to do
- Install Zyxel's security update for Multiple Firewalls. 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
- Zyxel Multiple Firewalls OS Command Injection Vulnerability
- Product
- Zyxel Multiple Firewalls
- CISA description
- A command injection vulnerability in the CGI program of some Zyxel firewall versions could allow an attacker to modify specific files and then execute some OS commands on a vulnerable device.
- Type of flaw
- Command or code injection (CWE-78)
- Confirmed exploited
- May 16, 2022
- US federal patch deadline
- Jun 6, 2022
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Answering about CVE-2022-30525 ·
Questions about CVE-2022-30525
Is CVE-2022-30525 being exploited?
Yes. CISA added CVE-2022-30525 to its Known Exploited Vulnerabilities catalog on May 16, 2022, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2022-30525?
Install Zyxel's security update for Multiple Firewalls. 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-2022-30525?
Only if you use Zyxel Multiple Firewalls. This one is aimed at devices or apps of the kind people own.