CVE-2022-3192Network attack vector

Unauthenticated port 1200 interruption via malformed request

Published Mar 31, 2023 · Updated Feb 11, 2025

Improper error handling in ABB AC500 V2 before 2.8.6 allows remote attackers to interrupt its port 1200 service via crafted requests. The Level 2 AC protocol handler fails to process an invalid request through its error-handling path, producing a denial-of-service condition on TCP port 1200. Network access to the PLC is sufficient and no login is required; communications through the separate port 1201 TCP/IP protocol remain available.

CVSS severity5.3
Medium
EPSS probability0.56%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper error handling in ABB AC500 V2 before 2.8.6 allows remote attackers to interrupt its port 1200 service via crafted requests. The Level 2 AC protocol handler fails to process an invalid request through its error-handling path, producing a denial-of-service condition on TCP port 1200. Network access to the PLC is sufficient and no login is required; communications through the separate port 1201 TCP/IP protocol remain available.

The record

CVE
CVE-2022-3192
Published
Mar 31, 2023
Updated
Feb 11, 2025
Vendor
GENEREX SYSTEMS Computervertriebsgesellschaft mbH
Product
AC500 V2
Classifications
CWE-754, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 31, 2023CVE publishedPublication date reported by the CVE source.
  2. Feb 11, 2025Record 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=2.0.0 <2.8.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

GENEREX SYSTEMS Computervertriebsgesellschaft mbH · AC500 V2version=2.0.0 <2.8.6

Published CVSS scores

5.3ABBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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-754Improper Check for Unusual or Exceptional Conditions
T0814Denial of Service

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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