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CVE-2021-40518

22
FAUCET Score

CVE-2021-40518 describes a Cross-Site Request Forgery (CSRF) vulnerability affecting Airangel HSMX Gateway devices up to version 5.2.04, impacting various HSMX-APP models. This medium-severity vulnerability, with a CVSS score of 6.5, can be exploited remotely with low attack complexity, requiring user interaction to achieve high integrity impact without affecting confidentiality or availability. While no active exploitation or public exploit code (Metasploit, Nuclei, ExploitDB) has been identified, and community discussion is minimal, organizations using affected Airangel HSMX Gateway devices should consider patching to mitigate this risk.

Impacted Technologies

VendorProductVersion(s)CPE
<= 5.2.04CPE matchmatch criteria
cpe:2.3:o:airangel:hsmx-app-25_firmware:*:*:*:*:*:*:*:*
<= 5.2.04CPE matchmatch criteria
cpe:2.3:o:airangel:hsmx-app-100_firmware:*:*:*:*:*:*:*:*
<= 5.2.04CPE matchmatch criteria
cpe:2.3:o:airangel:hsmx-app-1000_firmware:*:*:*:*:*:*:*:*
<= 5.2.04CPE matchmatch criteria
cpe:2.3:o:airangel:hsmx-app-5000_firmware:*:*:*:*:*:*:*:*
<= 5.2.04CPE matchmatch criteria
cpe:2.3:o:airangel:hsmx-app-20000_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
HIGH
Availability Impact
NONE
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.41%
Probability of exploitation in next 30 days
EPSS Percentile
33.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0041 is in the 35th percentile among its peer group of 26,219 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

etizazmohsin.com / hsmx.html
ExploitThird Party Advisory
airangel.com / hsmx-gateway
Product