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 firmware Ver.1.99 and prior, WHR-300 firmware…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.86%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 8.8 HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.86% probability · 56th percentile
- CISA KEV
- Not listed
- Affected
- buffalo/bhr-4grv firmware · buffalo/dwr-hp-g300nh firmware · buffalo/hw-450hp-zwe firmware · buffalo/whr-300hp firmware · buffalo/whr-300 firmware · buffalo/whr-g301n firmware · buffalo/whr-hp-g300n firmware · buffalo/whr-hp-gn firmware · buffalo/wpl-05g300 firmware · buffalo/wzr-450hp-cwt firmware · buffalo/wzr-450hp-ub 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 · buffalo/wzr-300hp firmware · buffalo/wzr-450hp firmware · buffalo/wzr-600dhp firmware · buffalo/wzr-d1100h firmware · +4 more
- Source
- vultures@jpcert.or.jp
References
- https://jvn.jp/en/vu/JVNVU99235714/index.htmlThird Party Advisory
- https://www.buffalo.jp/news/detail/20210427-01.htmlVendor Advisory
- https://jvn.jp/en/vu/JVNVU99235714/index.htmlThird Party Advisory
- https://www.buffalo.jp/news/detail/20210427-01.htmlVendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.