What is CVE-2021-21892?

CVE-2021-21892 is a critical-severity vulnerability in Lantronix Premierwave 2050, classified under Stack-based Buffer Overflow. CVSS score: 9.9/10. Published 2021-12-22.

How severe is CVE-2021-21892?

Critical severity. CVSS v3 base score is 9.9 out of 10.

Buffer overflow in Lantronix Premierwave 2050

CVE-2021-21892

A stack-based buffer overflow vulnerability exists in the Web Manager FsUnmount 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.

Vulnerability class: Buffer Overflow

EPSS: 0.304 (98.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Lantronix Premierwave_2050
Lantronix Premierwave_2050_firmware — versions 8.9.0.0
N/a Lantronix — versions Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU)

Weakness classification (CWE)

References

talos-cna@cisco.com (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-21892?: CVE-2021-21892 is a critical-severity vulnerability in Lantronix Premierwave 2050, classified under Stack-based Buffer Overflow. CVSS score: 9.9/10. Published 2021-12-22.
How severe is CVE-2021-21892?: Critical severity. CVSS v3 base score is 9.9 out of 10.