{"cve":"CVE-2021-3512","nvd":{"published":"2021-04-28T01:15:17.187","modified":"2026-06-17T04:05:15.997","status":"Modified","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":[],"references":["https://jvn.jp/en/vu/JVNVU99235714/index.html","https://www.buffalo.jp/news/detail/20210427-01.html","https://jvn.jp/en/vu/JVNVU99235714/index.html","https://www.buffalo.jp/news/detail/20210427-01.html"],"products":["buffalo:bhr-4grv_firmware","buffalo:dwr-hp-g300nh_firmware","buffalo:fs-600dhp_firmware","buffalo:fs-g300n_firmware","buffalo:fs-hp-g300n_firmware","buffalo:fs-r600dhp_firmware","buffalo:hw-450hp-zwe_firmware","buffalo:whr-300_firmware","buffalo:whr-300hp_firmware","buffalo:whr-g301n_firmware","buffalo:whr-hp-g300n_firmware","buffalo:whr-hp-gn_firmware","buffalo:wpl-05g300_firmware","buffalo:wzr-300hp_firmware","buffalo:wzr-450hp-cwt_firmware","buffalo:wzr-450hp-ub_firmware","buffalo:wzr-450hp_firmware","buffalo:wzr-600dhp_firmware","buffalo:wzr-d1100h_firmware","buffalo:wzr-hp-ag300h_firmware","buffalo:wzr-hp-g300nh_firmware","buffalo:wzr-hp-g301nh_firmware","buffalo:wzr-hp-g302h_firmware","buffalo:wzr-hp-g450h_firmware"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-3512","score":0.00857,"percentile":0.58445,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}