CVE-2026-87121

The lwIP TCP/IP Stack MQTT Client Application is vulnerable to an out-of-bounds write , which could allow an attacker to achieve full code execution on the affected device. While no specific software version or root cause is provided, the vulnerability has been observed in the wild, with sighting...

CVE-2026-87121 Out-of-bounds write in lwIP TCP/IP Stack MQTT Client Application

lwIP TCP/IP Stack MQTT is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device...

CVE-2026-87121 Out-of-bounds write in lwIP TCP/IP Stack MQTT Client Application

lwIP TCP/IP Stack MQTT is vulnerable to an out-of-bounds write, which may allow an attacker to gain full code execution on the device...

lwIP TCP/IP Stack MQTT Client Application

ADVISORY SUMMARY Successful exploitation of this vulnerability could allow an attacker to gain full code execution on the device. 2. RECOMMENDED PRACTICES CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Minimize network exposure for all...