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CVE-2021-44080

35
FAUCET Score

CVE-2021-44080 is a command injection vulnerability found in the SerComm h500s web server (setup.cgi), specifically affecting firmware version lowi-h500s-v3.4.22. This flaw allows authenticated administrators to execute arbitrary operating system commands as root by manipulating the connection_type parameter within the statussupport_diagnostic_tracing.json endpoint. Rated with a CVSS score of 7.2 (HIGH), this vulnerability has a network attack vector, low attack complexity, and requires high privileges for exploitation, but no user interaction. Successful exploitation can lead to complete compromise of confidentiality, integrity, and availability of the affected device. Currently, there is no evidence of active exploitation, nor are there publicly available exploit modules in Metasploit, Nuclei, or ExploitDB. The vulnerability has also received minimal community discussion and media coverage, suggesting a low level of public awareness or attention.

Impacted Technologies

VendorProductVersion(s)CPE
lowi-h500s-v3.4.22CPE matchmatch criteria
cpe:2.3:o:sercomm:h500s_firmware:lowi-h500s-v3.4.22:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.2HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
1.2
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
23.67%
Probability of exploitation in next 30 days
EPSS Percentile
97.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.2367 is in the 96th percentile among its peer group of 5,537 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.3 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

research.nccgroup.com / 2022/05/24/technical-advisory-sercomm-h500s-authenticated-remote-command-execution-cve-2021-44080
ExploitThird Party Advisory
sercomm.com
Vendor Advisory