CVE-2020-10826 Command injection in n/a

Critical 9.8 Published 26 Mar 2020 Updated 5 May 2025

Remote attackers can execute arbitrary commands on Draytek routers if DEBUG mode is enabled, requiring a firmware upgrade to mitigate.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2020-10826?

CVE-2020-10826 is a critical command injection vulnerability in n/a, published on 26 Mar 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

/cgi-bin/activate.cgi on Draytek Vigor3900, Vigor2960, and Vigor300B devices before 1.5.1 allows remote attackers to achieve command injection via a remote HTTP request in DEBUG mode.

Weakness: CWE-77

Which versions are affected by CVE-2020-10826?

It affects 3 products.

Products include Draytek Vigor2960 Firmware, Draytek Vigor300b Firmware, Draytek Vigor3900 Firmware.

How do I fix CVE-2020-10826?

No fix has been published for CVE-2020-10826 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2020-10826 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2020-10826 exists.

Sources

Also known as GHSA-8g46-9c84-98vh.