CVE-2023-3321

Code execution via writable Mosquitto plugin configuration

Published Jul 24, 2023 · Updated Oct 24, 2024

Improper permissions in ABB Ability zenon 11 through build 106404 allow local users to execute arbitrary code through CDDataHub.conf. The Service Grid Data Hub directory grants non-administrators write access to CDDataHub.conf, which controls Mosquitto plugin loading and accepts an arbitrary executable path. Exploitation requires low-privileged access to a Windows host with the optional Service Grid installed; successful execution can alter zenon runtime activity with the service's privileges.

CVSS severity8.8
High
EPSS probability0.37%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper permissions in ABB Ability zenon 11 through build 106404 allow local users to execute arbitrary code through CDDataHub.conf. The Service Grid Data Hub directory grants non-administrators write access to CDDataHub.conf, which controls Mosquitto plugin loading and accepts an arbitrary executable path. Exploitation requires low-privileged access to a Windows host with the optional Service Grid installed; successful execution can alter zenon runtime activity with the service's privileges.

The record

CVE
CVE-2023-3321
Published
Jul 24, 2023
Updated
Oct 24, 2024
Vendor
GENEREX SYSTEMS Computervertriebsgesellschaft mbH
Product
ABB Ability zenon
Classifications
CWE-15, T1574
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 24, 2023CVE publishedPublication date reported by the CVE source.
  2. Oct 24, 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=11 build <=11 build 106404

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

GENEREX SYSTEMS Computervertriebsgesellschaft mbH · ABB Ability zenonversion=11 build <=11 build 106404

Published CVSS scores

7.0ABBCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.4ABBCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:W/RC:C

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-15External Control of System or Configuration Setting
T1574Hijack Execution Flow

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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