CVE-2021-20716
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
| CVSS | 9.8 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| EPSS | 3.18% — more likely to be exploited than 88% of all CVEs |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-04-28 |
| Last modified | 2026-06-17 |
Affected (40)
| Vendor | Product |
|---|---|
| buffalo | bhr-4rv |
| buffalo | bhr-4rv firmware |
| buffalo | fs-g54 |
| buffalo | fs-g54 firmware |
| buffalo | wbr-b11 |
| buffalo | wbr-b11 firmware |
| buffalo | wbr-g54 |
| buffalo | wbr-g54 firmware |
| buffalo | wbr-g54l |
| buffalo | wbr-g54l firmware |
| buffalo | wbr2-b11 |
| buffalo | wbr2-b11 firmware |
| buffalo | wbr2-g54 |
| buffalo | wbr2-g54 firmware |
| buffalo | wbr2-g54-kd |
| buffalo | wbr2-g54-kd firmware |
| buffalo | whr-g54 |
| buffalo | whr-g54 firmware |
| buffalo | whr-g54-nf |
| buffalo | whr-g54-nf firmware |
| buffalo | whr2-a54g54 |
| buffalo | whr2-a54g54 firmware |
| buffalo | whr2-g54 |
| buffalo | whr2-g54 firmware |
| buffalo | whr2-g54v |
| buffalo | whr2-g54v firmware |
| buffalo | whr3-ag54 |
| buffalo | whr3-ag54 firmware |
| buffalo | wla-b11 |
| buffalo | wla-b11 firmware |
| buffalo | wla-g54 |
| buffalo | wla-g54 firmware |
| buffalo | wla-g54c |
| buffalo | wla-g54c firmware |
| buffalo | wla2-g54 |
| buffalo | wla2-g54 firmware |
| buffalo | wla2-g54c |
| buffalo | wla2-g54c firmware |
| buffalo | wlah-a54g54 |
| buffalo | wlah-a54g54 firmware |
References
→ the Explorer · watch your stack · NVD