CVE-2024-0220Network attack vector

Code execution via intercepted legacy TLS traffic

Published Feb 22, 2024 · Updated Sep 19, 2024

Insecure communications in B&R Automation Studio before 4.6 and Technology Guarding before 1.4.0 allow man-in-the-middle attackers to run code. The clients permit TLS versions below 1.2 when contacting B&R-hosted upgrade and licensing services, allowing intercepted traffic to be altered or read. Exploitation requires network access sufficient to intercept the affected node's traffic and user interaction; successful tampering executes code, while passive interception exposes sensitive data.

CVSS severity8.3
High
EPSS probability0.36%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure communications in B&R Automation Studio before 4.6 and Technology Guarding before 1.4.0 allow man-in-the-middle attackers to run code. The clients permit TLS versions below 1.2 when contacting B&R-hosted upgrade and licensing services, allowing intercepted traffic to be altered or read. Exploitation requires network access sufficient to intercept the affected node's traffic and user interaction; successful tampering executes code, while passive interception exposes sensitive data.

The record

CVE
CVE-2024-0220
Published
Feb 22, 2024
Updated
Sep 19, 2024
Vendor
B&R Industrial Automation
Product
Automation Studio
Classifications
CWE-94, CWE-1240, CWE-319, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 22, 2024CVE publishedPublication date reported by the CVE source.
  2. Sep 19, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=4.0 <4.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

B&R Industrial Automation · Automation Studioversion=4.0 <4.6
B&R Industrial Automation · Technology Guardingversion=1.0.0 <1.4.0

Published CVSS scores

8.1NIST NVDCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.3Asea Brown Boveri Ltd. (ABB)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
7.2B&R Industrial AutomationCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C

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-94Improper Control of Generation of Code ('Code Injection')
CWE-1240Use of a Cryptographic Primitive with a Risky Implementation
CWE-319Cleartext Transmission of Sensitive Information
T1557Adversary-in-the-Middle

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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