CVE-2022-31482: Carrier LENELS2 Lnl-4420 Firmware

High severity, CVSS 7.5. EPSS: 1% chance of exploitation in the next 30 days.

An unauthenticated attacker can send a specially crafted unauthenticated HTTP request to the device that can overflow a buffer. This vulnerability impacts products based on HID Mercury Intelligent Controllers LP1501, LP1502, LP2500, LP4502, and EP4502 which contain firmware versions prior to 1.29. The overflowed data leads to segmentation fault and ultimately a denial-of-service condition, causing the device to reboot. The impact of this vulnerability is that an unauthenticated attacker could leverage this flaw to cause the target device to become unresponsive. An attacker could automate this attack to achieve persistent DoS, effectively rendering the target controller useless.

Affected products

• Carrier LENELS2 Lnl-4420 Firmware: before 1.29 (fixed in 1.29)
• Carrier LENELS2 Lnl-x2210 Firmware: before 1.29 (fixed in 1.29)
• Carrier LENELS2 Lnl-x2220 Firmware: before 1.29 (fixed in 1.29)
• Carrier LENELS2 Lnl-x3300 Firmware: before 1.29 (fixed in 1.29)
• Carrier LENELS2 Lnl-x4420 Firmware: before 1.29 (fixed in 1.29)
• Carrier LENELS2 s2-Lp-1501 Firmware: before 1.29 (fixed in 1.29)
• Carrier LENELS2 s2-Lp-1502 Firmware: before 1.29 (fixed in 1.29)
• Carrier LENELS2 s2-Lp-2500 Firmware: before 1.29 (fixed in 1.29)
• Carrier LENELS2 s2-Lp-4502 Firmware: before 1.29 (fixed in 1.29)
• Hidglobal EP4502 Firmware: before 1.29 (fixed in 1.29)
• Hidglobal LP1501 Firmware: before 1.29 (fixed in 1.29)
• Hidglobal LP1502 Firmware: before 1.29 (fixed in 1.29)
• Hidglobal LP2500 Firmware: before 1.29 (fixed in 1.29)
• Hidglobal LP4502 Firmware: before 1.29 (fixed in 1.29)

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