CVE-2021-21888

Name: CVE-2021-21888
Creator: NVD / NIST
Published: 2021-12-22T19:15:09.317+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.1/10EPSS 3.89%

Last modified Jun 17, 2026

CVE-2021-21888 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. An OS command injection vulnerability exists in the Web Manager SslGenerateCertificate functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to arbitrary command execution. EPSS estimates a 3.89% chance of exploitation in the next 30 days.

Description

An OS command injection vulnerability exists in the Web Manager SslGenerateCertificate functionality of Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU). A specially crafted HTTP request can lead to arbitrary command execution. An attacker can make an authenticated HTTP request to trigger this vulnerability.

Metrics

CVSS 3.1

9.1/10

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

EPSS Probability

3.89%

88.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Lantronix	Premierwave 2050 Firmware	8.9.0.0	R4

References

https://talosintelligence.com/vulnerability_reports/TALOS-2021-1332Exploit, Technical Description, Third Party Advisory
https://talosintelligence.com/vulnerability_reports/TALOS-2021-1332Exploit, Technical Description, Third Party Advisory

Timeline

Published: Dec 22, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-21888?

How severe is CVE-2021-21888?

CVE-2021-21888 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 3.89% probability of exploitation in the next 30 days.

How do I fix CVE-2021-21888?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-21888?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST