CVE-2021-21879
CVSS v3
8.8
HIGH
EPSS Score
3.7 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
A directory traversal vulnerability exists in the Web Manager File Upload functionality of Lantronix PremierWave 2050 8.9.0.0R4. A specially-crafted HTTP request can lead to arbitrary file overwrite. An attacker can make an authenticated HTTP request to trigger this vulnerability.
Technical details
- Published
- 2021-12-22
Frequently asked questions
What is CVE-2021-21879?
A directory traversal vulnerability exists in the Web Manager File Upload functionality of Lantronix PremierWave 2050 8.9.0.0R4. A specially-crafted HTTP request can lead to arbitrary file overwrite. An attacker can make an authenticated HTTP request to trigger this vulnerability.
Is CVE-2021-21879 actively exploited?
Active exploitation of CVE-2021-21879 has not been confirmed. Its EPSS score was 3.7% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-21879?
CVE-2021-21879 has a CVSS v3 base score of 8.8 (HIGH severity).
Is CVE-2021-21879 affecting your environment?
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