CVE-2026-33280 Command injection in BUFFALO Wi-Fi router products
Attackers can exploit hidden debugging functionality in BUFFALO Wi-Fi routers to execute arbitrary OS commands.
- 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-2026-33280?
CVE-2026-33280 is a high-severity command injection vulnerability in BUFFALO Wi-Fi router products, published on 27 Mar 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Hidden functionality issue exists in BUFFALO Wi-Fi router products, which may allow an attacker to gain access to the product’s debugging functionality, resulting in the execution of arbitrary OS commands.
Weakness: CWE-912
Which versions are affected by CVE-2026-33280?
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-2026-33280?
No fix has been published for CVE-2026-33280 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-2026-33280 being exploited?
There is no known exploitation of CVE-2026-33280 in the wild and no public exploit code.
Other vulnerabilities in BUFFALO Wi-Fi router products
Sources
Also known as GHSA-3vp9-wjw8-vgmx.