HIGH
CVE-2021-4161
CWE-319Published: December 27, 2021· Updated: Jun 17, 2026
7.5
CVSS v3.1
Official Description
The affected products contain vulnerable firmware, which could allow an attacker to sniff the traffic and decrypt login credential details. This could give an attacker admin rights through the HTTP web server.
Technical Analysis
CVE-2021-4161 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 7.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Affected Vendors & Products
moxa6 product(s)
mgate mb3180 firmwaremgate mb3180mgate mb3280 firmwaremgate mb3280mgate mb3480 firmwaremgate mb3480
Source: NVD CPE · 6 total CPE entries
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
All References (2)
→
https://www.cisa.gov/uscert/ics/advisories/icsa-21-357-01Third Party Advisory · US Government Resource
→
https://www.cisa.gov/uscert/ics/advisories/icsa-21-357-01Third Party Advisory · US Government Resource
Quick Facts
CVE IDCVE-2021-4161
CVSS Score7.5 / 10
SeverityHIGH
WeaknessCWE-319
CISA KEVNo
Affected1 vendor(s)
PublishedDec 27, 2021
Related CVEs (CWE-319)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2021-4161 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.