CVE-2021-21890

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

• CWE-121
• CWE-787

• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1334Exploit, Technical Description, Third Party Advisory
• https://talosintelligence.com/vulnerability_reports/TALOS-2021-1334Exploit, Technical Description, Third Party Advisory

Published

Dec 22, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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