CVE-2021-21890

9.1 criticalEPSS 3.1%

Critical (9.1) in lantronix premierwave 2050 firmware. EPSS 3.1% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

9.1 critical

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS: 3.1% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-11-01)
CWEs: CWE-787, CWE-121
Published: 2021-12-22
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

lantronix:premierwave_2050_firmware

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1334
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1334

Check your stack JSON