CVE-2021-20716

Hidden functionality in multiple Buffalo network devices (BHR-4RV firmware Ver.2.55 and prior, FS-G54 firmware Ver.2.04 and prior, WBR2-B11 firmware Ver.2.32โ€ฆ

published April 28, 2021

CVSS
โ€”
EPSS
3%
Percentile
88.0
In the wild
Unconfirmed
What it is

๐Ÿšจ A sneaky debug option hides in multiple Buffalo network devices, waiting for the wrong remote attacker to find it! โš ๏ธ Think of this vulnerability like a hidden trapdoor in a secure office building โ€” if a determined intruder discovers it, they can waltz in, change the locks, and even turn off the lights!๐ŸŽญ An attacker could exploit this debug functionality to execute arbitrary code, making it possible to change configurations at will or even trigger a denial of service (DoS) condition. This means they could disrupt your network services as easily as flipping a switch!

Put simply

Think of this vulnerability like a hidden trapdoor in a secure office building โ€” if a determined intruder discovers it, they can waltz in, change the locks, and even turn off the lights!๐ŸŽญ This vulnerability allows remote attackers to enable hidden debug options on Buffalo devices with outdated firmware versions, giving them the ability to execute arbitrary commands or modify configurations without authorization.

What to do

An attacker could exploit this debug functionality to execute arbitrary code, making it possible to change configurations at will or even trigger a denial of service (DoS) condition. This means they could disrupt your network services as easily as flipping a switch! Immediate action is required! Update to the latest firmware version for each affected device. Ensure that all configurations are reviewed to prevent unauthorized access. ๐Ÿ”’ You've got this! By taking these steps, you'll help secure your network and keep those pesky intruders at bay! ๐Ÿ›ก๏ธ

The record
Technical detail
CVSS
Not scored
CVSS v4.0
Not supplied
EPSS
0.03179 ยท 88.0th percentile
Published
2021-04-28T00:45Z
EPSS history
Timeline
  • 28 APR 00:45Z
    Hidden functionality in multiple Buffalo network devices (BHR-4RV firmware Ver.2.55 and prior, FS-G54 firmware Ver.2.04 and prior, WBR2-B11 firmware Ver.2.32โ€ฆ
    cvelistv5