CVE-2026-86530 Command injection in WEX-G300
An administrative user can execute arbitrary OS commands on BUFFALO Wi-Fi routers via crafted HTTP requests due to improper input handling.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-86530?
CVE-2026-86530 is a high-severity command injection vulnerability in BUFFALO INC. WEX-G300, published on 28 Sep 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
BUFFALO Wi-Fi products handle some web form input improperly to assemble command line strings internally. An administrative user may send a crafted HTTP request and execute an arbitrary OS command.
Weakness: CWE-78
Which versions are affected by CVE-2026-86530?
How do I fix CVE-2026-86530?
No fix has been published for CVE-2026-86530 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-2026-86530 being exploited?
There is no known exploitation of CVE-2026-86530 in the wild and no public exploit code.
Sources
Also known as GHSA-j628-7w6r-937x.