Is CVE-2021-3512 actively exploited?

CVE-2021-3512 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2021-3512?

CVE-2021-3512 has a CVSS score of 8.8 (HIGH severity). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2021-3512?

Patch guidance is available from buffalo security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2021-3512.

Fix CVE-2021-3512 - HIGH buffalo bhr-4grv firmware

Q: Which products are affected by CVE-2021-3512?

24 products: buffalo bhr-4grv firmware, buffalo dwr-hp-g300nh firmware, buffalo hw-450hp-zwe firmware, buffalo whr-300hp firmware, buffalo whr-300 firmware, and 19 more.

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 Metrics

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: adjacent network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: NVD-CWE-Other

Metadata

Primary Vendor: BUFFALO
Published: 4/28/2021
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

buffalo : bhr-4grv_firmwarebuffalo : dwr-hp-g300nh_firmwarebuffalo : hw-450hp-zwe_firmwarebuffalo : whr-300hp_firmwarebuffalo : whr-300_firmwarebuffalo : whr-g301n_firmwarebuffalo : whr-hp-g300n_firmwarebuffalo : whr-hp-gn_firmwarebuffalo : wpl-05g300_firmwarebuffalo : wzr-450hp-cwt_firmwarebuffalo : wzr-450hp-ub_firmwarebuffalo : wzr-hp-ag300h_firmwarebuffalo : wzr-hp-g300nh_firmwarebuffalo : wzr-hp-g301nh_firmwarebuffalo : wzr-hp-g302h_firmwarebuffalo : wzr-hp-g450h_firmwarebuffalo : wzr-300hp_firmwarebuffalo : wzr-450hp_firmwarebuffalo : wzr-600dhp_firmwarebuffalo : wzr-d1100h_firmwarebuffalo : fs-hp-g300n_firmwarebuffalo : fs-600dhp_firmwarebuffalo : fs-r600dhp_firmwarebuffalo : fs-g300n_firmware

Remediation Guidance

Executive Summary

View on NIST NVD