CVE-2021-40521
Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.
Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.
- Record
CVE-2021-40521- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Updated
- 2026-11-02
CVE List No score
Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.
- Record
CVE-2021-40521- Updated
- 2026-11-02
EUVDEUVD-2021-27697 No score
Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.
- Record
EUVD-2021-27697- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fw83-hp96-3f54 No score
Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.
Airangel HSMX Gateway devices through 5.2.04 allow Remote Code Execution.
- Record
GHSA-fw83-hp96-3f54- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-40521 is a critical vulnerability (CVSS 9.8) in Airangel Hsmx-app-1000 Firmware, published November 10, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 4.49%, the 91st percentile. No source names a fixed version.