CVE-2026-12520 | Zephyr Project up to 4.4.1 HL7800 Cellular Modem Driver hl7800.c on_cmd_atcmdinfo_rssi stack-based overflow

August 18, 2026 Yanac

A vulnerability was found in Zephyr Project Zephyr up to 4.4.1. It has been rated as very critical. Affected is the function on_cmd_atcmdinfo_rssi of the file drivers/modem/vendor_standalone/hl7800.c of the component HL7800 Cellular Modem Driver. This manipulation causes stack-based buffer overflow.

This vulnerability is handled as CVE-2026-12520. The attack can be initiated remotely. There is not any exploit available.

Upgrading the affected component is advised.VulDB Recent EntriesRead More