What is CVE-2021-40518?

CVE-2021-40518 is a medium-severity vulnerability in Airangel Hsmx-App-100, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2021-11-10.

How severe is CVE-2021-40518?

Medium severity. CVSS v3 base score is 6.5 out of 10.

CSRF in Airangel Hsmx-App-100

CVE-2021-40518

Airangel HSMX Gateway devices through 5.2.04 allow CSRF.

Vulnerability class: CSRF (Cross-Site Request Forgery)

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

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.

EPSS exploit prediction

EPSS: 0.004 (34.5th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-352 — Cross-Site Request Forgery (CSRF)

References

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

Frequently asked questions

What is CVE-2021-40518?: CVE-2021-40518 is a medium-severity vulnerability in Airangel Hsmx-App-100, classified under Cross-Site Request Forgery (CSRF). CVSS score: 6.5/10. Published 2021-11-10.
How severe is CVE-2021-40518?: Medium severity. CVSS v3 base score is 6.5 out of 10.