CVE-2020-18754Public exploitNetwork attack vector

Control-program disclosure via unauthenticated EPA requests

Published Aug 13, 2021 · Updated Aug 4, 2024

Information disclosure in DCCE MAC1100 PLC firmware allows remote attackers to read control-program bytecode over the EPA service. The UDP service on port 11000 accepts a fixed sequence of nine EPA request datagrams and returns the PLC program stored in OB1 without authentication. Network access to that service is sufficient; the demonstrated consequence is disclosure of proprietary control logic, with no reported write or service-interruption capability.

CVSS severity7.5
High
EPSS probability1.33%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in DCCE MAC1100 PLC firmware allows remote attackers to read control-program bytecode over the EPA service. The UDP service on port 11000 accepts a fixed sequence of nine EPA request datagrams and returns the PLC program stored in OB1 without authentication. Network access to that service is sufficient; the demonstrated consequence is disclosure of proprietary control logic, with no reported write or service-interruption capability.

The record

CVE
CVE-2020-18754
Published
Aug 13, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-668, T0882
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 13, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
5.0NVDAV:N/AC:L/Au:N/C:P/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-668Exposure of Resource to Wrong Sphere
T0882Theft of Operational Information

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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