CVE-2020-6983

In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9...

7.5 High

In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9 or lower, the affected products use a hard-coded cryptographic key, which increases the possibility that confidential data can be recovered.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

1.48%Up 1.1 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2020-6983
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:P/I:N/A:N
Weakness: CWE-321, CWE-798
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-6983
Weakness: CWE-321
Updated: 2026-11-02

EUVDEUVD-2020-28123 No score

Record: EUVD-2020-28123
Updated: 2026-11-03

GitHub AdvisoriesGHSA-6q75-7wm8-cjfw No score

In Moxa PT-7528 series firmware, Version 4.0 or lower, and PT-7828 series firmware, Version 3.9...

Record: GHSA-6q75-7wm8-cjfw
Updated: 2026-11-02

Affected products

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History

History
Recorded	Changed	Sources
Nov 10, 2026	facts
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-6983 is a high vulnerability (CVSS 7.5) in Moxa Pt-7528-12msc-12tx-4gsfp-hv-hv Firmware, published March 24, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.48%, the 74th percentile. No source names a fixed version.