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CVE-2020-6983

19
FAUCET Score

CVE-2020-6983 is a high-severity vulnerability affecting Moxa PT-7528 (firmware v4.0 or lower) and PT-7828 (firmware v3.9 or lower) series devices, stemming from the use of a hard-coded cryptographic key. This flaw allows an unauthenticated attacker to remotely recover confidential data due to the predictable key. While rated 7.5 HIGH on CVSS, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0CPE matchmatch criteria
cpe:2.3:o:moxa:pt-7528-24tx-hv_firmware:*:*:*:*:*:*:*:*
<= 4.0CPE matchmatch criteria
cpe:2.3:o:moxa:pt-7528-24tx-hv-hv_firmware:*:*:*:*:*:*:*:*
<= 4.0CPE matchmatch criteria
cpe:2.3:o:moxa:pt-7528-24tx-wv_firmware:*:*:*:*:*:*:*:*
<= 4.0CPE matchmatch criteria
cpe:2.3:o:moxa:pt-7528-24tx-wv-hv_firmware:*:*:*:*:*:*:*:*
<= 4.0CPE matchmatch criteria
cpe:2.3:o:moxa:pt-7528-24tx-wv-wv_firmware:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.24%
Probability of exploitation in next 30 days
EPSS Percentile
66.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0124 is in the 45th percentile among its peer group of 51,551 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

us-cert.gov / ics/advisories/icsa-20-056-03
Third Party AdvisoryUS Government Resource