CVE-2020-6993

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, an attacker can gain access to sensitive information from the web service without authorization.

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

1.56%Up 1.1 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

Record: CVE-2020-6993
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-200
Updated: 2026-11-02

CVE List No score

Record: CVE-2020-6993
Weakness: CWE-200
Updated: 2026-11-02

EUVDEUVD-2020-28133 No score

Record: EUVD-2020-28133
Updated: 2026-11-03

GitHub AdvisoriesGHSA-qpp5-5qcc-4rmx No score

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

Record: GHSA-qpp5-5qcc-4rmx
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-2020-6993 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 1.56%, the 75th percentile. No source names a fixed version.