CVE-2021-21890 | BDVDB-2026-166329 Detail

Lantronix

Description#

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.

Impact#

Per CVSS v3.0: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-121 Stack-based Buffer Overflow

References#

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

Exploit#

No public exploit known

History#

Version 12021-12-22Record published in the CVE List.
Version 22024-08-03Most recent update recorded in the CVE List.

Published

Published: 2021-12-22
Last modified: 2024-08-03

Vendor information

Vendor: Not stated
Product: Lantronix

Score

9.1 Critical

EPSS

3.0%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 87.8.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU)
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

Not available

CVSS v3.0

9.1 Critical

CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	High
User Interaction	None
Scope	Changed
Confidentiality	High
Integrity	High
Availability	High

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).