What is CVE-2021-41427?

CVE-2021-41427 is a medium-severity vulnerability in Beeline Smart Box, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-11-10.

How severe is CVE-2021-41427?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Beeline Smart Box

CVE-2021-41427

Beeline Smart Box 2.0.38 is vulnerable to Cross Site Scripting (XSS) via the choose_mac parameter to setup.cgi.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2021-11-10 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.011 (63.9th percentile), scored 2026-10-03.

Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 63.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: 0.000

Affected products

Beeline Smart Box
Beeline Smart Box Firmware — versions 2.0.38

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

tula.beeline.ru/customers/pomosh/home/domashnij-internet/nastrojki-s-routerom/b… (Product, Vendor Advisory)
youtu.be/CbWI-JQteRo (Exploit, Third Party Advisory)
youtu.be/HL73yOW7YWU (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-41427?: CVE-2021-41427 is a medium-severity vulnerability in Beeline Smart Box, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2021-11-10.
How severe is CVE-2021-41427?: Medium severity. CVSS v3 base score is 6.1 out of 10.