{"cve":"CVE-2022-40966","nvd":{"published":"2022-12-07T10:15:11.073","modified":"2026-06-17T05:02:19.123","status":"Modified","description":"Authentication bypass vulnerability in multiple Buffalo network devices allows a network-adjacent attacker to bypass authentication and access the device. The affected products/versions are as follows: WCR-300 firmware Ver. 1.87 and earlier, WHR-HP-G300N firmware Ver. 2.00 and earlier, WHR-HP-GN firmware Ver. 1.87 and earlier, WPL-05G300 firmware Ver. 1.88 and earlier, WRM-D2133HP firmware Ver. 2.85 and earlier, WRM-D2133HS firmware Ver. 2.96 and earlier, WTR-M2133HP firmware Ver. 2.85 and earlier, WTR-M2133HS firmware Ver. 2.96 and earlier, WXR-1900DHP firmware Ver. 2.50 and earlier, WXR-1900DHP2 firmware Ver. 2.59 and earlier, WXR-1900DHP3 firmware Ver. 2.63 and earlier, WXR-5950AX12 firmware Ver. 3.40 and earlier, WXR-6000AX12B firmware Ver. 3.40 and earlier, WXR-6000AX12S firmware Ver. 3.40 and earlier, WZR-300HP firmware Ver. 2.00 and earlier, WZR-450HP firmware Ver. 2.00 and earlier, WZR-600DHP firmware Ver. 2.00 and earlier, WZR-900DHP firmware Ver. 1.15 and earlier, WZR-1750DHP2 firmware Ver. 2.31 and earlier, WZR-HP-AG300H firmware Ver. 1.76 and earlier, WZR-HP-G302H firmware Ver. 1.86 and earlier, WEM-1266 firmware Ver. 2.85 and earlier, WEM-1266WP firmware Ver. 2.85 and earlier, WLAE-AG300N firmware Ver. 1.86 and earlier, FS-600DHP firmware Ver. 3.40 and earlier, FS-G300N firmware Ver. 3.14 and earlier, FS-HP-G300N firmware Ver. 3.33 and earlier, FS-R600DHP firmware Ver. 3.40 and earlier, BHR-4GRV firmware Ver. 2.00 and earlier, DWR-HP-G300NH firmware Ver. 1.84 and earlier, DWR-PG firmware Ver. 1.83 and earlier, HW-450HP-ZWE firmware Ver. 2.00 and earlier, WER-A54G54 firmware Ver. 1.43 and earlier, WER-AG54 firmware Ver. 1.43 and earlier, WER-AM54G54 firmware Ver. 1.43 and earlier, WER-AMG54 firmware Ver. 1.43 and earlier, WHR-300 firmware Ver. 2.00 and earlier, WHR-300HP firmware Ver. 2.00 and earlier, WHR-AM54G54 firmware Ver. 1.43 and earlier, WHR-AMG54 firmware Ver. 1.43 and earlier, WHR-AMPG firmware Ver. 1.52 and earlier, WHR-G firmware Ver. 1.49 and earlier, WHR-G300N firmware Ver. 1.65 and earlier, WHR-G301N firmware Ver. 1.87 and earlier, WHR-G54S firmware Ver. 1.43 and earlier, WHR-G54S-NI firmware Ver. 1.24 and earlier, WHR-HP-AMPG firmware Ver. 1.43 and earlier, WHR-HP-G firmware Ver. 1.49 and earlier, WHR-HP-G54 firmware Ver. 1.43 and earlier, WLI-H4-D600 firmware Ver. 1.88 and earlier, WS024BF firmware Ver. 1.60 and earlier, WS024BF-NW firmware Ver. 1.60 and earlier, WXR-1750DHP firmware Ver. 2.60 and earlier, WXR-1750DHP2 firmware Ver. 2.60 and earlier, WZR-1166DHP firmware Ver. 2.18 and earlier, WZR-1166DHP2 firmware Ver. 2.18 and earlier, WZR-1750DHP firmware Ver. 2.30 and earlier, WZR2-G300N firmware Ver. 1.55 and earlier, WZR-450HP-CWT firmware Ver. 2.00 and earlier, WZR-450HP-UB firmware Ver. 2.00 and earlier, WZR-600DHP2 firmware Ver. 1.15 and earlier, WZR-600DHP3 firmware Ver. 2.19 and earlier, WZR-900DHP2 firmware Ver. 2.19 and earlier, WZR-AGL300NH firmware Ver. 1.55 and earlier, WZR-AMPG144NH firmware Ver. 1.49 and earlier, WZR-AMPG300NH firmware Ver. 1.51 and earlier, WZR-D1100H firmware Ver. 2.00 and earlier, WZR-G144N firmware Ver. 1.48 and earlier, WZR-G144NH firmware Ver. 1.48 and earlier, WZR-HP-G300NH firmware Ver. 1.84 and earlier, WZR-HP-G301NH firmware Ver. 1.84 and earlier, WZR-HP-G450H firmware Ver. 1.90 and earlier, WZR-S1750DHP firmware Ver. 2.32 and earlier, WZR-S600DHP firmware Ver. 2.19 and earlier, and WZR-S900DHP firmware Ver. 2.19 and earlier.","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":["CWE-287"],"references":["https://jvn.jp/en/vu/JVNVU92805279/index.html","https://www.buffalo.jp/news/detail/20221003-01.html","https://jvn.jp/en/vu/JVNVU92805279/index.html","https://www.buffalo.jp/news/detail/20221003-01.html"],"products":["buffalo:bhr-4grv_firmware","buffalo:dwr-hp-g300nh_firmware","buffalo:dwr-pg_firmware","buffalo:fs-600dhp_firmware","buffalo:fs-g300n_firmware","buffalo:fs-hp-g300n_firmware","buffalo:fs-r600dhp_firmware","buffalo:hw-450hp-zwe_firmware","buffalo:wcr-300_firmware","buffalo:wem-1266_firmware","buffalo:wem-1266wp_firmware","buffalo:wer-a54g54_firmware","buffalo:wer-ag54_firmware","buffalo:wer-am54g54_firmware","buffalo:wer-amg54_firmware","buffalo:whr-300_firmware","buffalo:whr-300hp_firmware","buffalo:whr-am54g54_firmware","buffalo:whr-amg54_firmware","buffalo:whr-ampg_firmware","buffalo:whr-g300n_firmware","buffalo:whr-g301n_firmware","buffalo:whr-g54s-ni_firmware","buffalo:whr-g54s_firmware","buffalo:whr-g_firmware","buffalo:whr-hp-ampg_firmware","buffalo:whr-hp-g300n_firmware","buffalo:whr-hp-g54_firmware","buffalo:whr-hp-g_firmware","buffalo:whr-hp-gn_firmware","buffalo:wlae-ag300n_firmware","buffalo:wli-h4-d600_firmware","buffalo:wpl-05g300_firmware","buffalo:wrm-d2133hp_firmware","buffalo:wrm-d2133hs_firmware","buffalo:ws024bf-nw_firmware","buffalo:ws024bf_firmware","buffalo:wtr-m2133hp_firmware","buffalo:wtr-m2133hs_firmware","buffalo:wxr-1750dhp2_firmware","buffalo:wxr-1750dhp_firmware","buffalo:wxr-1900dhp2_firmware","buffalo:wxr-1900dhp3_firmware","buffalo:wxr-1900dhp_firmware","buffalo:wxr-5950ax12_firmware","buffalo:wxr-6000ax12b_firmware","buffalo:wxr-6000ax12s_firmware","buffalo:wzr-1166dhp2_firmware","buffalo:wzr-1166dhp_firmware","buffalo:wzr-1750dhp2_firmware"],"source":"nvd","synced_at":"2026-10-19T21:37:28.463369388+00:00"},"epss":{"cve":"CVE-2022-40966","score":0.00351,"percentile":0.28723,"date":"2026-10-31"},"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."]}