How severe is CVE-2016-5804?

CVE-2016-5804 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2016-5804 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2016-5804?

CVE-2016-5804 primarily affects Moxa Mgate Mb3180 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2016-5804?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2016-5804 published?

CVE-2016-5804 was published on 2016-07-15 and last updated on 2026-06-17.

CVE-2016-5804

CVE-2016-5804 is a critical-severity vulnerability in Moxa Mgate Mb3180 Firmware with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-326.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-326
Affected product: Moxa Mgate Mb3180 Firmware
Published: 2016-07-15
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2016-5804?: 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.
How severe is CVE-2016-5804?: CVE-2016-5804 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2016-5804 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2016-5804?: CVE-2016-5804 primarily affects Moxa Mgate Mb3180 Firmware. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2016-5804?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2016-5804 published?: CVE-2016-5804 was published on 2016-07-15 and last updated on 2026-06-17.

References

Affected products (5)

cpe:2.3:o:moxa:mgate_mb3180_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:mgate_mb3280_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:mgate_mb3480_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:mgate_mb3170_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:mgate_mb3270_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Moxa Mgate Mb3180 Firmware

CVE-2021-4161 — Critical (CVSS 9.8): The affected products contain vulnerable firmware, which could allow an attacker to sniff the traffic and decrypt login…
CVE-2021-33824 — High (CVSS 7.5): An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012. Attackers can use slowhttptest tool to send…
CVE-2021-33823 — High (CVSS 7.5): An issue was discovered on MOXA Mgate MB3180 Version 2.1 Build 18113012. Attacker could send a huge amount of TCP SYN…

All CVEs affecting Moxa Mgate Mb3180 Firmware →

Other CWE-326 (Inadequate Encryption Strength) vulnerabilities

CVE-2026-44523 — Critical (CVSS 10.0): Note Mark is an open-source note-taking application. Prior to 0.19.4, no minimum length or entropy is enforced on the…
CVE-2020-6966 — Critical (CVSS 10.0): In ApexPro Telemetry Server Versions 4.2 and prior, CARESCAPE Telemetry Server v4.2 & prior, Clinical Information…
CVE-2014-9199 — Critical (CVSS 10.0): The Clorius Controls Java web client before 01.00.0009g allows remote attackers to discover credentials by sniffing the…
CVE-2018-25272 — Critical (CVSS 9.8): ELBA5 5.8.0 contains a remote code execution vulnerability that allows attackers to obtain database credentials and…
CVE-2025-12478 — Critical (CVSS 9.8): Non-Compliant TLS Configuration.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5 .
CVE-2022-24116 — Critical (CVSS 9.8): Certain General Electric Renewable Energy products have inadequate encryption strength. This affects iNET and iNET II…

Browse all CWE-326 (Inadequate Encryption Strength) vulnerabilities →