How severe is CVE-2020-6999?

CVE-2020-6999 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2020-6999 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-6999?

CVE-2020-6999 affects Moxa Mds-g516e Firmware. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-6999?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2020-6999 published?

CVE-2020-6999 was published on 2020-03-26 and last updated on 2026-06-17.

CVE-2020-6999

CVE-2020-6999 is a medium-severity vulnerability in Moxa Mds-g516e Firmware with a CVSS 3.x base score of 6.5. 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-120.

Key facts

Severity: Medium (CVSS 3.x base score 6.5)
CVSS v2: 4.0
EPSS exploit prediction: 1% (58th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Moxa Mds-g516e Firmware
Published: 2020-03-26
Last modified: 2026-06-17

Description

In Moxa EDS-G516E Series firmware, Version 5.2 or lower, some of the parameters in the setting pages do not ensure text is the correct size for its buffer.

Frequently asked questions

What is CVE-2020-6999?: In Moxa EDS-G516E Series firmware, Version 5.2 or lower, some of the parameters in the setting pages do not ensure text is the correct size for its buffer.
How severe is CVE-2020-6999?: CVE-2020-6999 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-6999 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (58th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-6999?: CVE-2020-6999 affects Moxa Mds-g516e Firmware. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-6999?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2020-6999 published?: CVE-2020-6999 was published on 2020-03-26 and last updated on 2026-06-17.

References

https://www.us-cert.gov/ics/advisories/icsa-20-056-04

Affected products (1)

cpe:2.3:o:moxa:mds-g516e_firmware:*:*:*:*:*:*:*:*

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