CVE-2017-6884 Zyxel EMG2926 Routers Command Injection
Attackers can execute arbitrary commands on Zyxel EMG2926 routers via the nslookup diagnostic tool, requiring immediate firmware updates.
- Exploited in the wild
- Since 18 Sep 2023
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2017-6884?
CVE-2017-6884 is a high-severity command injection vulnerability in n/a, published on 6 Apr 2017. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A command injection vulnerability was discovered on the Zyxel EMG2926 home router with firmware V1.00(AAQT.4)b8. The vulnerability is located in the diagnostic tools, specifically the nslookup function. A malicious user may exploit numerous vectors to execute arbitrary commands on the router, such as the ping_ip parameter to the expert/maintenance/diagnostic/nslookup URI.
Weakness: CWE-78
Which versions are affected by CVE-2017-6884?
It affects 1 product.
Products include Zyxel Emg2926 Firmware.
How do I fix CVE-2017-6884?
No fix has been published for CVE-2017-6884 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 9 Oct 2023.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2017-6884 being exploited?
Yes. Attackers have exploited CVE-2017-6884 in the wild since at least 18 Sep 2023, including in ransomware campaigns.
Public exploit code: 1 Exploit-DB entry.
Sources
Also known as GHSA-x6r5-p9fx-6346.