CVE-2021-37386: Furukawa 423-41w/ac Firmware

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Furukawa Electric LatAm 423-41W/AC before v1.1.4 and LD421-21W before v1.3.3 were discovered to contain an HTML injection vulnerability via the serial number update function.

Affected products

• Furukawa 423-41w/ac Firmware: before 1.2.0 (fixed in 1.2.0)
• Furukawa LD420-10r Firmware: before 1.4.0 (fixed in 1.4.0)
• Furukawa LD421-21w Firmware: before 1.5.0 (fixed in 1.5.0)
• Furukawa LD421-21wv Firmware: before 1.5.0 (fixed in 1.5.0)

Published 2023-07-17. Last modified 2026-06-17.