How severe is CVE-2020-6979?

CVE-2020-6979 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2020-6979 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-6979?

CVE-2020-6979 primarily affects Moxa Eds-g516e Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2020-6979?

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

When was CVE-2020-6979 published?

CVE-2020-6979 was published on 2020-03-24 and last updated on 2026-06-17.

CVE-2020-6979

CVE-2020-6979 is a high-severity vulnerability in Moxa Eds-g516e Firmware with a CVSS 3.x base score of 7.5. 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-798.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (65th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-798
Affected product: Moxa Eds-g516e Firmware
Published: 2020-03-24
Last modified: 2026-06-17

Description

In Moxa EDS-G516E Series firmware, Version 5.2 or lower, the affected products use a hard-coded cryptographic key, increasing the possibility that confidential data can be recovered.

Frequently asked questions

What is CVE-2020-6979?: In Moxa EDS-G516E Series firmware, Version 5.2 or lower, the affected products use a hard-coded cryptographic key, increasing the possibility that confidential data can be recovered.
How severe is CVE-2020-6979?: CVE-2020-6979 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2020-6979 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (65th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-6979?: CVE-2020-6979 primarily affects Moxa Eds-g516e Firmware. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-6979?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2020-6979 published?: CVE-2020-6979 was published on 2020-03-24 and last updated on 2026-06-17.

References

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

Affected products (2)

cpe:2.3:o:moxa:eds-g516e_firmware:*:*:*:*:*:*:*:*
cpe:2.3:o:moxa:eds-510e_firmware:*:*:*:*:*:*:*:*

More vulnerabilities in Moxa Eds-g516e Firmware

CVE-2020-7007 — Critical (CVSS 9.8): In Moxa EDS-G516E Series firmware, Version 5.2 or lower, the attacker may execute arbitrary codes or target the device,…
CVE-2020-6991 — Critical (CVSS 9.8): In Moxa EDS-G516E Series firmware, Version 5.2 or lower, weak password requirements may allow an attacker to gain…
CVE-2020-6981 — Critical (CVSS 9.8): In Moxa EDS-G516E Series firmware, Version 5.2 or lower, an attacker may gain access to the system without proper…
CVE-2020-7001 — High (CVSS 7.5): In Moxa EDS-G516E Series firmware, Version 5.2 or lower, the affected products use a weak cryptographic algorithm,…
CVE-2020-6997 — High (CVSS 7.5): In Moxa EDS-G516E Series firmware, Version 5.2 or lower, sensitive information is transmitted over some web…
CVE-2019-19707 — High (CVSS 7.5): On Moxa EDS-G508E, EDS-G512E, and EDS-G516E devices (with firmware through 6.0), denial of service can occur via…

All CVEs affecting Moxa Eds-g516e Firmware →

Other CWE-798 (Use of Hard-coded Credentials) vulnerabilities

CVE-2026-13768 — Critical (CVSS 10.0): Gardyn devices expose a privileged iothubowner key. Access to this key will allow a malicious user to invoke an IoTHub…
CVE-2026-45631 — Critical (CVSS 10.0): Dokploy is a free, self-hostable Platform as a Service (PaaS). From 0.27.0 to before 0.29.3, a hardcoded…
CVE-2026-22769 — Critical (CVSS 10.0): Dell RecoverPoint for Virtual Machines, versions prior to 6.0.3.1 HF1, contain a hardcoded credential vulnerability.…
CVE-2025-42890 — Critical (CVSS 10.0): SQL Anywhere Monitor (Non-GUI) baked credentials into the code,exposing the resources or functionality to unintended…
CVE-2025-7503 — Critical (CVSS 10.0): An OEM IP camera manufactured by Shenzhen Liandian Communication Technology LTD exposes a Telnet service (port 23) with…
CVE-2025-20309 — Critical (CVSS 10.0): A vulnerability in Cisco Unified Communications Manager (Unified CM) and Cisco Unified Communications Manager Session…

Browse all CWE-798 (Use of Hard-coded Credentials) vulnerabilities →