CVE-2020-10624Network attack vector

Session-token disclosure via cleartext network transmission

Published Jun 26, 2020 · Updated Aug 4, 2024

Cleartext transmission in Honeywell ControlEdge PLC and RTU affected releases allows remote attackers to capture a session token. The affected network communication sends an active session token without transport encryption; Honeywell and CISA do not identify the protocol or message. The listed releases are PLC R130.2, R140, R150, and R151 and RTU R101, R110, R140, R150, and R151; attackers must observe controller traffic, and disclosure compromises session confidentiality.

CVSS severity7.5
High
EPSS probability0.74%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Cleartext transmission in Honeywell ControlEdge PLC and RTU affected releases allows remote attackers to capture a session token. The affected network communication sends an active session token without transport encryption; Honeywell and CISA do not identify the protocol or message. The listed releases are PLC R130.2, R140, R150, and R151 and RTU R101, R110, R140, R150, and R151; attackers must observe controller traffic, and disclosure compromises session confidentiality.

The record

CVE
CVE-2020-10624
Published
Jun 26, 2020
Updated
Aug 4, 2024
Vendor
Honeywell Technologies
Product
ControlEdge PLC
Classifications
CWE-319, T1040
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 26, 2020CVE 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=R130.2
  2. Affected versionversion=R140
  3. Affected versionversion=R150
  4. Affected versionversion=R151

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Honeywell Technologies · ControlEdge PLCversion=R130.2; version=R140; version=R150; version=R151
Honeywell Technologies · ControlEdge RTUversion=R101; version=R110; version=R140; version=R150; version=R151

Published CVSS scores

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

Weakness, pattern, technique

CWE-319Cleartext Transmission of Sensitive Information
T1040Network Sniffing

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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