CVE-2022-31481: Carrier LENELS2 Lnl-4420 Firmware

Critical severity, CVSS 10.0. EPSS: 1.6% chance of exploitation in the next 30 days.

An unauthenticated attacker can send a specially crafted update file 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 1.302 for the LP series and 1.296 for the EP series. The overflowed data can allow the attacker to manipulate the “normal” code execution to that of their choosing. An attacker with this level of access on the device can monitor all communications sent to and from this device, modify onboard relays, change configuration files, or cause the device to become unstable.

Affected products

• Carrier LENELS2 Lnl-4420 Firmware: before 1.296 (fixed in 1.296)
• Carrier LENELS2 Lnl-x2210 Firmware: before 1.302 (fixed in 1.302)
• Carrier LENELS2 Lnl-x2220 Firmware: before 1.302 (fixed in 1.302)
• Carrier LENELS2 Lnl-x3300 Firmware: before 1.302 (fixed in 1.302)
• Carrier LENELS2 Lnl-x4420 Firmware: before 1.302 (fixed in 1.302)
• Carrier LENELS2 s2-Lp-1501 Firmware: before 1.302 (fixed in 1.302)
• Carrier LENELS2 s2-Lp-1502 Firmware: before 1.302 (fixed in 1.302)
• Carrier LENELS2 s2-Lp-2500 Firmware: before 1.302 (fixed in 1.302)
• Carrier LENELS2 s2-Lp-4502 Firmware: before 1.302 (fixed in 1.302)
• Hidglobal EP4502 Firmware: before 1.296 (fixed in 1.296)
• Hidglobal LP1501 Firmware: before 1.302 (fixed in 1.302)
• Hidglobal LP1502 Firmware: before 1.302 (fixed in 1.302)
• Hidglobal LP2500 Firmware: before 1.302 (fixed in 1.302)
• Hidglobal LP4502 Firmware: before 1.302 (fixed in 1.302)

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