CVE-2022-43763Network attack vector

Node outage via unchecked Tbase command preconditions

Published Feb 8, 2023 · Updated Mar 25, 2025

Unchecked return handling in B&R Industrial Automation APROL before R 4.2-07 allows remote attackers to stop a system node via crafted commands. The Tbase server calls commands without adequately checking their preconditions, allowing a specially crafted network message to leave the node stopped or inaccessible. Exploitation requires network access to an affected node, and the published impact is limited to availability rather than data disclosure or modification.

CVSS severity7.5
High
EPSS probability0.62%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unchecked return handling in B&R Industrial Automation APROL before R 4.2-07 allows remote attackers to stop a system node via crafted commands. The Tbase server calls commands without adequately checking their preconditions, allowing a specially crafted network message to leave the node stopped or inaccessible. Exploitation requires network access to an affected node, and the published impact is limited to availability rather than data disclosure or modification.

The record

CVE
CVE-2022-43763
Published
Feb 8, 2023
Updated
Mar 25, 2025
Vendor
B&R Industrial Automation
Product
APROL
Classifications
CWE-252, T0814
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 8, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=< R 4.2-07

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

B&R Industrial Automation · APROLversion=< R 4.2-07

Published CVSS scores

7.3B&R Industrial AutomationCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:F/RL:U/RC:C
7.5Asea Brown Boveri Ltd. (ABB)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-252Unchecked Return Value
T0814Denial of Service

Public exploit references

No public exploit references are available in this record.

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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