CVE-2022-41648

Published Oct 28, 2022 CVSS 4.0 · 9.2 Critical EPSS < 1% KEV · Not listed
Description
The HEIDENHAIN Controller TNC 640 NC software Version 340590 07 SP5, is vulnerable to improper authentication in its DNC communication for CNC machines. Authentication is not enabled by default for DNC communication. This vulnerability may allow an attacker to deny service on the production line, steal sensitive data from the production line, and alter any products created by the production line. Note: CNC machines running the TNC 640 controller require DNC to be enabled for DNC communication to be present.

Remediation

Vendor Solution

HEIDENHAIN has identified the following specific workarounds and mitigations users can apply to reduce risk: * Block LSV2 and DNC communication using the integrated firewall in the controller's operating system. * Use zone firewalls to isolate and segment the network of the affected devices. * Ask your machinery vendor (running HEIDENHAIN controllers) for updates to a recent software version, where SSH tunneling is standard.


Vendor Workaround

HEIDENHAIN has identified the following specific workarounds and mitigations users can apply to reduce risk: * Block LSV2 and DNC communication using the integrated firewall in the controller's operating system. * Use zone firewalls to isolate and segment the network of the affected devices. * Ask machinery vendor (running HEIDENHAIN controllers) for updates to a recent software version, where SSH tunneling is standard.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2022-44836 The HEIDENHAIN Controller TNC 640, version 340590 07 SP5, running HEROS 5.08.3 controlling the HARTFORD 5A-65E CNC machine is vulnerable to improper authentication, which may allow an attacker to deny service to the production line, steal sensitive data from the production line, and alter any products created by the production line.
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Description The HEIDENHAIN Controller TNC 640, version 340590 07 SP5, running HEROS 5.08.3 controlling the HARTFORD 5A-65E CNC machine is vulnerable to improper authentication, which may allow an attacker to deny service to the production line, steal sensitive data from the production line, and alter any products created by the production line. The HEIDENHAIN Controller TNC 640 NC software Version 340590 07 SP5, is vulnerable to improper authentication in its DNC communication for CNC machines. Authentication is not enabled by default for DNC communication. This vulnerability may allow an attacker to deny service on the production line, steal sensitive data from the production line, and alter any products created by the production line. Note: CNC machines running the TNC 640 controller require DNC to be enabled for DNC communication to be present.
Weaknesses CWE-1188
References
Metrics cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
icscert
Published
Updated
Oct 13, 2025, 12:09 PM
Reserved
Sep 29, 2022, 12:00 AM
Status
Modified
Published
Oct 28, 2022, 6:15 PM
Modified
Jun 17, 2026, 5:03 AM