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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.030 (86.8th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 86.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
- Lantronix Premierwave 2050
- Lantronix Premierwave 2050 Firmware — versions 8.9.0.0
- Lantronix — versions Lantronix PremierWave 2050 8.9.0.0R4 (in QEMU)
Weakness classification (CWE)
References
- talosintelligence.com/vulnerability_reports/TALOS-2021-1334 (Technical Description, Exploit, Third Party Advisory)
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.