CVE-2021-40521 json
Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.
published 2021-11-10 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-27697
- cvss
- 9.8
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 4.5%
- EPSS 4.5% chance of exploitation in 30 days, percentile 91%
- public exploits
- 0
- none known
Summary
Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.
Exploit prediction
4.49% chance of exploitation in the next 30 days, higher than 91% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- etizazmohsin.com http://etizazmohsin.com/hsmx.html#rce referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVD | 2.0 | 10.0 | AV:N/AC:L/Au:N/C:C/I:C/A:C |
References
-
etizazmohsin.com
/hsmx.html#rce
exploit, third-party-advisory
-
airangel.com
/hsmx-gateway/
product
Sources
- CVE List CVE-2021-40521
- NVD CVE-2021-40521
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.