Moxa MGate MB3180 before 1.8, MGate MB3280 before 2.7, MGate MB3480 before 2.6, MGate MB3170 before 2.5, and MGate MB3270 before 2.7 use wea
Moxa MGate MB3180 before 1.8, MGate MB3280 before 2.7, MGate MB3480 before 2.6, MGate MB3170 before 2.5, and MGate MB3270 before 2.7 use weak encryption, which allows remote attackers to bypass authentication via a brute-force series of guesses for a parameter value.
- Published
- Jul 15, 2016
- Updated
- Jun 16, 2026
- EPSS
- 1.1% · 65th percentile
- CWE
- CWE-326
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Report tools
Action score
39
Monitor
Low priority for now.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.1%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| moxa | mgate mb3180 firmware | cpe:2.3:o:moxa:mgate_mb3180_firmware |
| moxa | mgate mb3180 | cpe:2.3:h:moxa:mgate_mb3180 |
| moxa | mgate mb3280 firmware | cpe:2.3:o:moxa:mgate_mb3280_firmware |
| moxa | mgate mb3280 | cpe:2.3:h:moxa:mgate_mb3280 |
| moxa | mgate mb3480 firmware | cpe:2.3:o:moxa:mgate_mb3480_firmware |
| moxa | mgate mb3480 | cpe:2.3:h:moxa:mgate_mb3480 |
| moxa | mgate mb3170 firmware | cpe:2.3:o:moxa:mgate_mb3170_firmware |
| moxa | mgate mb3170 | cpe:2.3:h:moxa:mgate_mb3170 |
| moxa | mgate mb3270 firmware | cpe:2.3:o:moxa:mgate_mb3270_firmware |
| moxa | mgate mb3270 | cpe:2.3:h:moxa:mgate_mb3270 |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- moxa mgate mb3170 firmwarebefore 2.5
- moxa mgate mb3180 firmwarebefore 1.8
- moxa mgate mb3270 firmwarebefore 2.7
- moxa mgate mb3280 firmwarebefore 2.7
- moxa mgate mb3480 firmwarebefore 2.6
Same product
moxa: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-33824An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012.31Monitor
- CVE-2021-4161ICSA-21-357-01 Moxa MGate Protocol Gateways30Monitor
- CVE-2021-33823An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012.30Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-326 · Inadequate Encryption StrengthCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.