What is CVE-2021-40517?

CVE-2021-40517 is a medium-severity vulnerability in Airangel Hsmx-App-100, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-11-10.

How severe is CVE-2021-40517?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Airangel Hsmx-App-100

CVE-2021-40517

Airangel HSMX Gateway devices through 5.2.04 is vulnerable to stored Cross Site Scripting. XSS Payload is placed in the name column of the updates table using database access.

Vulnerability class: XSS (Cross-Site Scripting)

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

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.005 (42.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

airangel.com/hsmx-gateway/ (Product)
etizazmohsin.com/hsmx.html (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2021-40517?: CVE-2021-40517 is a medium-severity vulnerability in Airangel Hsmx-App-100, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2021-11-10.
How severe is CVE-2021-40517?: Medium severity. CVSS v3 base score is 5.4 out of 10.