CVE-2022-41648Network attack vector

Production disruption and data compromise via unauthenticated DNC

Published Oct 28, 2022 · Updated Oct 13, 2025

Improper authentication in HEIDENHAIN TNC 640 NC software 340590 07 SP5 allows remote attackers to read or modify production data via DNC. The controller initializes DNC communication without authentication by default, accepting unauthenticated network access when DNC is enabled. A reachable DNC service is required; exploitation can disclose or alter production data and interrupt the production line.

CVSS severity9.2
Critical
EPSS probability0.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper authentication in HEIDENHAIN TNC 640 NC software 340590 07 SP5 allows remote attackers to read or modify production data via DNC. The controller initializes DNC communication without authentication by default, accepting unauthenticated network access when DNC is enabled. A reachable DNC service is required; exploitation can disclose or alter production data and interrupt the production line.

The record

CVE
CVE-2022-41648
Published
Oct 28, 2022
Updated
Oct 13, 2025
Vendor
HEIDENHAIN
Product
TNC 640
Classifications
CWE-287, CWE-1188, T0866
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Oct 13, 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=340590 07 SP5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HEIDENHAIN · TNC 640version=340590 07 SP5

Published CVSS scores

9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.2CISA ICS CNACVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-287Improper Authentication
CWE-1188Insecure Default Initialization of Resource
T0866Exploitation of Remote Services

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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