NVD

CVE-2021-3512 Detail

Modified After Enrichment

This CVE record has been updated after NVD enrichment efforts were completed. Enrichment data supplied by the NVD may require amendment due to these changes.

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.

Metrics

NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.

CVSS 4.0 Severity and Vector Strings:

NIST: NVD

N/A

NVD assessment not yet provided.

CVSS 3.x Severity and Vector Strings:

NIST: NVD

Base Score: 8.8 HIGH

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 2.0 Severity and Vector Strings:

National Institute of Standards and Technology

NIST: NVD

Base Score: 8.3 HIGH

Vector: (AV:A/AC:L/Au:N/C:C/I:C/A:C)

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://jvn.jp/en/vu/JVNVU99235714/index.html	CVE, JPCERT/CC	Third Party Advisory
https://www.buffalo.jp/news/detail/20210427-01.html	CVE, JPCERT/CC	Vendor Advisory

Weakness Enumeration

CWE-ID	CWE Name	Source
NVD-CWE-Other	Other	NIST

Known Affected Software Configurations Switch to CPE 2.2

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Denotes Vulnerable Software
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Change History

5 change records found show changes

Initial Analysis by NIST 5/12/2021 1:55:08 PM

Action	Type	Old Value	New Value
Added	CVSS V3.1		NIST AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Added	CVSS V2		NIST (AV:A/AC:L/Au:N/C:C/I:C/A:C)
Added	CWE		NIST CWE-863
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:bhr-4grv_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:bhr-4grv:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:dwr-hp-g300nh_firmware::::::::* versions up to (excluding) 1.84 OR cpe:2.3:h:buffalo:dwr-hp-g300nh:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:fs-600dhp_firmware::::::::* versions up to (excluding) 3.40 OR cpe:2.3:h:buffalo:fs-600dhp:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:fs-g300n_firmware::::::::* versions up to (excluding) 3.14 OR cpe:2.3:h:buffalo:fs-g300n:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:fs-hp-g300n_firmware::::::::* versions up to (excluding) 3.33 OR cpe:2.3:h:buffalo:fs-hp-g300n:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:fs-r600dhp_firmware::::::::* versions up to (excluding) 3.40 OR cpe:2.3:h:buffalo:fs-r600dhp:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:hw-450hp-zwe_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:hw-450hp-zwe:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:whr-300_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:whr-300:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:whr-300hp_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:whr-300hp:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:whr-g301n_firmware::::::::* versions up to (excluding) 1.87 OR cpe:2.3:h:buffalo:whr-g301n:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:whr-hp-g300n_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:whr-hp-g300n:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:whr-hp-gn_firmware::::::::* versions up to (excluding) 1.87 OR cpe:2.3:h:buffalo:whr-hp-gn:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wpl-05g300_firmware::::::::* versions up to (excluding) 1.88 OR cpe:2.3:h:buffalo:wpl-05g300:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-300hp_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:wzr-300hp:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-450hp-cwt_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:wzr-450hp-cwt:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-450hp-ub_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:wzr-450hp-ub:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-450hp_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:wzr-450hp:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-600dhp_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:wzr-600dhp:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-d1100h_firmware::::::::* versions up to (excluding) 2.00 OR cpe:2.3:h:buffalo:wzr-d1100h:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-hp-ag300h_firmware::::::::* versions up to (excluding) 1.76 OR cpe:2.3:h:buffalo:wzr-hp-ag300h:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-hp-g300nh_firmware::::::::* versions up to (excluding) 1.84 OR cpe:2.3:h:buffalo:wzr-hp-g300nh:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-hp-g301nh_firmware::::::::* versions up to (excluding) 1.84 OR cpe:2.3:h:buffalo:wzr-hp-g301nh:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-hp-g302h_firmware::::::::* versions up to (excluding) 1.86 OR cpe:2.3:h:buffalo:wzr-hp-g302h:-:::::::*
Added	CPE Configuration		AND OR cpe:2.3:o:buffalo:wzr-hp-g450h_firmware::::::::* versions up to (excluding) 1.90 OR cpe:2.3:h:buffalo:wzr-hp-g450h:-:::::::*
Changed	Reference Type	https://jvn.jp/en/vu/JVNVU99235714/index.html No Types Assigned	https://jvn.jp/en/vu/JVNVU99235714/index.html Third Party Advisory
Changed	Reference Type	https://www.buffalo.jp/news/detail/20210427-01.html No Types Assigned	https://www.buffalo.jp/news/detail/20210427-01.html Vendor Advisory

Quick Info

CVE Dictionary Entry:
CVE-2021-3512
NVD Published Date:
04/27/2021
NVD Last Modified:
06/17/2026
Source:
JPCERT/CC

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Information Technology Laboratory

National Vulnerability Database

National Vulnerability Database

CVE-2021-3512 Detail

Description

Metrics

References to Advisories, Solutions, and Tools

Weakness Enumeration

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Change History

CVE Modified by JPCERT/CC 6/17/2026 12:05:15 AM

CVE Modified by CVE 11/21/2024 1:21:43 AM

CVE Modified by JPCERT/CC 5/14/2024 5:24:37 AM

CWE Remap by NIST 7/12/2022 1:42:04 PM

Initial Analysis by NIST 5/12/2021 1:55:08 PM

Quick Info