peter bassill · operator
$ cve CVE-2021-20716 JSON

CVE-2021-20716

9.8
CRITICAL · CVSS 3.1 · EPSS 3.2% (pctl 88)

In your normal cycle

Critical by CVSS (9.8), but no sign of active exploitation.

Description

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.2.32 and prior, WBR2-G54 firmware Ver.2.32 and prior, WBR2-G54-KD firmware Ver.2.32 and prior, WBR-B11 firmware Ver.2.23 and prior, WBR-G54 firmware Ver.2.23 and prior, WBR-G54L firmware Ver.2.20 and prior, WHR2-A54G54 firmware Ver.2.25 and prior, WHR2-G54 firmware Ver.2.23 and prior, WHR2-G54V firmware Ver.2.55 and prior, WHR3-AG54 firmware Ver.2.23 and prior, WHR-G54 firmware Ver.2.16 and prior, WHR-G54-NF firmware Ver.2.10 and prior, WLA2-G54 firmware Ver.2.24 and prior, WLA2-G54C firmware Ver.2.24 and prior, WLA-B11 firmware Ver.2.20 and prior, WLA-G54 firmware Ver.2.20 and prior, WLA-G54C firmware Ver.2.20 and prior, WLAH-A54G54 firmware Ver.2.54 and prior, WLAH-AM54G54 firmware Ver.2.54 and prior, WLAH-G54 firmware Ver.2.54 and prior, WLI2-TX1-AG54 firmware Ver.2.53 and prior, WLI2-TX1-AMG54 firmware Ver.2.53 and prior, WLI2-TX1-G54 firmware Ver.2.20 and prior, WLI3-TX1-AMG54 firmware Ver.2.53 and prior, WLI3-TX1-G54 firmware Ver.2.53 and prior, WLI-T1-B11 firmware Ver.2.20 and prior, WLI-TX1-G54 firmware Ver.2.20 and prior, WVR-G54-NF firmware Ver.2.02 and prior, WZR-G108 firmware Ver.2.41 and prior, WZR-G54 firmware Ver.2.41 and prior, WZR-HP-G54 firmware Ver.2.41 and prior, WZR-RS-G54 firmware Ver.2.55 and prior, and WZR-RS-G54HP firmware Ver.2.55 and prior) allows a remote attacker to enable the debug option and to execute arbitrary code or OS commands, change the configuration, and cause a denial of service (DoS) condition.

Scoring

CVSS9.8 (CRITICAL, v3.1)
VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS3.18% — more likely to be exploited than 88% of all CVEs
On CISA KEVno
Public exploitnone known
Published2021-04-28
Last modified2026-06-17

Affected (40)

VendorProduct
buffalobhr-4rv
buffalobhr-4rv firmware
buffalofs-g54
buffalofs-g54 firmware
buffalowbr-b11
buffalowbr-b11 firmware
buffalowbr-g54
buffalowbr-g54 firmware
buffalowbr-g54l
buffalowbr-g54l firmware
buffalowbr2-b11
buffalowbr2-b11 firmware
buffalowbr2-g54
buffalowbr2-g54 firmware
buffalowbr2-g54-kd
buffalowbr2-g54-kd firmware
buffalowhr-g54
buffalowhr-g54 firmware
buffalowhr-g54-nf
buffalowhr-g54-nf firmware
buffalowhr2-a54g54
buffalowhr2-a54g54 firmware
buffalowhr2-g54
buffalowhr2-g54 firmware
buffalowhr2-g54v
buffalowhr2-g54v firmware
buffalowhr3-ag54
buffalowhr3-ag54 firmware
buffalowla-b11
buffalowla-b11 firmware
buffalowla-g54
buffalowla-g54 firmware
buffalowla-g54c
buffalowla-g54c firmware
buffalowla2-g54
buffalowla2-g54 firmware
buffalowla2-g54c
buffalowla2-g54c firmware
buffalowlah-a54g54
buffalowlah-a54g54 firmware

References

→ the Explorer  ·  watch your stack  ·  NVD