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HIGH · 8.8

CVE-2021-3512

Improper access control vulnerability in Buffalo broadband routers (BHR-4GRV firmware Ver.1.99 and prior, DWR-HP-G300NH firmware Ver.1.83 and prior, HW-450HP-ZWE firmware Ver.1.99 and prior, WHR-300HP...

Vulnerability Description

Improper access control vulnerability in Buffalo broadband routers (BHR-4GRV firmware Ver.1.99 and prior, DWR-HP-G300NH firmware Ver.1.83 and prior, HW-450HP-ZWE firmware Ver.1.99 and prior, WHR-300HP firmware Ver.1.99 and prior, WHR-300 firmware Ver.1.99 and prior, WHR-G301N firmware Ver.1.86 and prior, WHR-HP-G300N firmware Ver.1.99 and prior, WHR-HP-GN firmware Ver.1.86 and prior, WPL-05G300 firmware Ver.1.87 and prior, WZR-450HP-CWT firmware Ver.1.99 and prior, WZR-450HP-UB firmware Ver.1.99 and prior, WZR-HP-AG300H firmware Ver.1.75 and prior, WZR-HP-G300NH firmware Ver.1.83 and prior, WZR-HP-G301NH firmware Ver.1.83 and prior, WZR-HP-G302H firmware Ver.1.85 and prior, WZR-HP-G450H firmware Ver.1.89 and prior, WZR-300HP firmware Ver.1.99 and prior, WZR-450HP firmware Ver.1.99 and prior, WZR-600DHP firmware Ver.1.99 and prior, WZR-D1100H firmware Ver.1.99 and prior, FS-HP-G300N firmware Ver.3.32 and prior, FS-600DHP firmware Ver.3.38 and prior, FS-R600DHP firmware Ver.3.39 and prior, and FS-G300N firmware Ver.3.13 and prior) allows remote unauthenticated attackers to bypass access restriction and to start telnet service and execute arbitrary OS commands with root privileges via unspecified vectors.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
ADJACENT_NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH

Affected Products

VendorProductVersions
BuffaloBhr-4Grv Firmware< 2.00
BuffaloBhr-4Grv-
BuffaloDwr-Hp-G300Nh Firmware< 1.84
BuffaloDwr-Hp-G300Nh-
BuffaloHw-450Hp-Zwe Firmware< 2.00
BuffaloHw-450Hp-Zwe-
BuffaloWhr-300Hp Firmware< 2.00
BuffaloWhr-300Hp-
BuffaloWhr-300 Firmware< 2.00
BuffaloWhr-300-
BuffaloWhr-G301N Firmware< 1.87
BuffaloWhr-G301N-
BuffaloWhr-Hp-G300N Firmware< 2.00
BuffaloWhr-Hp-G300N-
BuffaloWhr-Hp-Gn Firmware< 1.87
BuffaloWhr-Hp-Gn-
BuffaloWpl-05G300 Firmware< 1.88
BuffaloWpl-05G300-
BuffaloWzr-450Hp-Cwt Firmware< 2.00
BuffaloWzr-450Hp-Cwt-

References

FAQ

What is CVE-2021-3512?

CVE-2021-3512 is a vulnerability with a CVSS score of 8.8 (HIGH). Improper access control vulnerability in Buffalo broadband routers (BHR-4GRV firmware Ver.1.99 and prior, DWR-HP-G300NH firmware Ver.1.83 and prior, HW-450HP-ZWE firmware Ver.1.99 and prior, WHR-300HP...

How severe is CVE-2021-3512?

CVE-2021-3512 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-3512?

Check the references section above for vendor advisories and patch information. Affected products include: Buffalo Bhr-4Grv Firmware, Buffalo Bhr-4Grv, Buffalo Dwr-Hp-G300Nh Firmware, Buffalo Dwr-Hp-G300Nh, Buffalo Hw-450Hp-Zwe Firmware.