What is CVE-2021-21890?

CVE-2021-21890 is a critical-severity vulnerability in Lantronix Premierwave 2050, classified under Stack-based Buffer Overflow. CVSS score: 9.1/10. Published 2021-12-22.

How severe is CVE-2021-21890?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Buffer overflow in Lantronix Premierwave 2050

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.

Vulnerability class: Buffer Overflow

EPSS: 0.030 (85.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:H/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 (Technical Description, Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-21890?: CVE-2021-21890 is a critical-severity vulnerability in Lantronix Premierwave 2050, classified under Stack-based Buffer Overflow. CVSS score: 9.1/10. Published 2021-12-22.
How severe is CVE-2021-21890?: Critical severity. CVSS v3 base score is 9.1 out of 10.