CVE-2024-5800Network attack vector

Network decryption via weak Diffie-Hellman groups

Published Aug 10, 2024 · Updated Aug 12, 2024

Inadequate encryption strength in the SSL/TLS stack of B&R Automation Runtime before 6.0.2 allows remote attackers to decrypt TLS traffic. The stack negotiates Diffie-Hellman groups that lack sufficient cryptographic strength, weakening session-key protection for intercepted traffic. Exploitation requires network access to an affected node and conditions sufficient to intercept its session; the bounded impact is exposure of protected communications.

CVSS severity8.3
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Inadequate encryption strength in the SSL/TLS stack of B&R Automation Runtime before 6.0.2 allows remote attackers to decrypt TLS traffic. The stack negotiates Diffie-Hellman groups that lack sufficient cryptographic strength, weakening session-key protection for intercepted traffic. Exploitation requires network access to an affected node and conditions sufficient to intercept its session; the bounded impact is exposure of protected communications.

The record

CVE
CVE-2024-5800
Published
Aug 10, 2024
Updated
Aug 12, 2024
Vendor
B&R Industrial Automation
Product
Automation Runtime
Classifications
CWE-326, T1557
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 12, 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=0 <6.0.0 changes=[{"at":"6.0.2","status":"unaffected"}]

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

B&R Industrial Automation · Automation Runtimeversion=0 <6.0.0 changes=[{"at":"6.0.2","status":"unaffected"}]

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
6.5B&R Industrial AutomationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N
5.7B&R Industrial AutomationCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C
8.3B&R Industrial AutomationCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA: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.

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-326Inadequate Encryption Strength
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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