CVE-2022-34840: Buffalo Hw-450hp-Zwe Firmware

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

Use of hard-coded credentials vulnerability in multiple Buffalo network devices allows a network-adjacent attacker to alter?configuration settings of the device. The affected products/versions are as follows: 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, HW-450HP-ZWE firmware Ver. 2.00 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, and WZR-D1100H firmware Ver. 2.00 and earlier.

Affected products

• Buffalo Hw-450hp-Zwe Firmware: up to and including 2.00
• Buffalo Wzr-300hp Firmware: up to and including 2.00
• Buffalo Wzr-450hp-Cwt Firmware: up to and including 2.00
• Buffalo Wzr-450hp-Ub Firmware: up to and including 2.00
• Buffalo Wzr-450hp Firmware: up to and including 2.00
• Buffalo Wzr-600dhp2 Firmware: up to and including 1.15
• Buffalo Wzr-600dhp Firmware: up to and including 2.00
• Buffalo Wzr-900dhp Firmware: up to and including 1.15
• Buffalo Wzr-d1100h Firmware: up to and including 2.00

Published 2022-12-07. Last modified 2026-06-17.