CVE-2026-27650 Command injection in BUFFALO Wi-Fi router products
An OS command injection vulnerability in BUFFALO Wi-Fi routers allows attackers to execute arbitrary commands on the device.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-27650?
CVE-2026-27650 is a high-severity command injection vulnerability in BUFFALO Wi-Fi router products, published on 27 Mar 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
OS Command Injection vulnerability exists in BUFFALO Wi-Fi router products. If this vulnerability is exploited, an arbitrary OS command may be executed on the products.
Weakness: CWE-78
Which versions are affected by CVE-2026-27650?
It affects 46 products.
Products include Buffalo Fs-M1266 Firmware, Buffalo Fs-S1266 Firmware, Buffalo Vr-U300w Firmware, Buffalo Vr-U500x Firmware, Buffalo Wapm-1266r Firmware, Buffalo Wapm-1266wdpr Firmware and 40 more.
How do I fix CVE-2026-27650?
No fix has been published for CVE-2026-27650 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-2026-27650 being exploited?
There is no known exploitation of CVE-2026-27650 in the wild and no public exploit code.
Other vulnerabilities in BUFFALO Wi-Fi router products
Sources
Also known as GHSA-33v8-g7j5-qg76.