CVE-2021-21889: Lantronix Premierwave 2050 Firmware

Critical severity, CVSS 9.9. EPSS: 2.8% chance of exploitation in the next 30 days.

A stack-based buffer overflow vulnerability exists in the Web Manager Ping functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to remote code execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Affected products

• Lantronix Premierwave 2050 Firmware: version 8.9.0.0 only

Published 2021-12-22. Last modified 2026-06-17.