CVE-2024-43781
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA vulnerability has been identified in SINUMERIK 828D V4 (All versions < V4.95 SP3), SINUMERIK 840D sl V4 (All versions < V4.95 SP3 in connection with using Create MyConfig (CMC) <= V4.8 SP1 HF6), SINUMERIK ONE (All versions < V6.23 in connection with using Create MyConfig (CMC) <= V6.6), SINUMERIK ONE (All versions < V6.15 SP4 in connection with using Create MyConfig (CMC) <= V6.6). Affected systems, that have been provisioned with Create MyConfig (CMC), contain a Insertion of Sensitive Information into Log File vulnerability. This could allow a local authenticated user with low privileges to read sensitive information and thus circumvent access restrictions.
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · high confidenceThis vulnerability in Siemens SINUMERIK CNC systems allows low-privileged local authenticated users to read sensitive information from log files, potentially circumventing access restrictions. The issue stems from sensitive data being written to log files during Create MyConfig (CMC) provisioning operations.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Local
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Identify the SINUMERIK product modelLocate the CNC system identification in the control panel or system documentation. Common models include SINUMERIK 828D, 840D sl, or SINUMERIK ONE.Affected if The system is one of the three affected product lines (828D, 840D sl, or ONE).
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Determine the SINUMERIK software versionAccess the system version information through the SINUMERIK operator interface (typically via 'System' > 'Version' or the commissioning tool). Record the full version string including any service packs (SP).Affected if The installed version is earlier than V4.95 SP3 for 828D/840D sl, or earlier than V6.23 / V6.15 SP4 for SINUMERIK ONE.
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Determine the Create MyConfig (CMC) versionCheck the CMC version through the commissioning software or by reviewing the CMC application documentation included with the SINUMERIK system.Affected if CMC version is at or below V4.8 SP1 HF6 (for 840D sl) or at or below V6.6 (for SINUMERIK ONE).
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Confirm if CMC provisioning has been usedReview whether any Create MyConfig provisioning operations have been performed on the system. This can be verified by checking for CMC-related entries in the system logs or configuration records.Affected if CMC provisioning operations have been performed on the system.
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Inspect log file locations and permissionsLocate the log files created during CMC operations (typically found in system log directories). Check if the file permissions allow access by low-privileged users.Affected if Log files from CMC operations exist and are readable by non-administrator users on the system.
A user is affected if they run a SINUMERIK 828D, 840D sl, or ONE system with a version before the fixed releases AND have used CMC provisioning, with log files accessible to low-privileged accounts.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scopedUpgrade SINUMERIK 828D to V4.95 SP3 or later, upgrade SINUMERIK 840D sl to V4.95 SP3 (with CMC <= V4.8 SP1 HF6), and upgrade SINUMERIK ONE to V6.23 or V6.15 SP4 (with CMC <= V6.6) respectively. Alternatively, review and secure log file permissions or disable CMC if not required.
SINUMERIK 828D V4: V4.95 SP3 or higher; SINUMERIK 840D sl V4: V4.95 SP3 or higher; SINUMERIK ONE: V6.23 or higher, or V6.15 SP4 or higher
- 1. Identify the exact SINUMERIK product model and current firmware version installed on the system.
- 2. For SINUMERIK 828D V4: Upgrade the firmware to version V4.95 SP3 or higher.
- 3. For SINUMERIK 840D sl V4: Upgrade the firmware to version V4.95 SP3 or higher, and ensure Create MyConfig (CMC) is updated to a version newer than V4.8 SP1 HF6 if CMC is in use.
- 4. For SINUMERIK ONE (first variant): Upgrade the firmware to version V6.23 or higher, and ensure Create MyConfig (CMC) is updated to a version newer than V6.6 if CMC is in use.
- 5. For SINUMERIK ONE (second variant): Upgrade the firmware to version V6.15 SP4 or higher, and ensure Create MyConfig (CMC) is updated to a version newer than V6.6 if CMC is in use.
- 6. After upgrading, verify that the log files no longer contain sensitive information and that access controls are properly enforced.
- 7. Review system logs after upgrade to confirm the vulnerability has been remediated.
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation4.0 h
- Implementation8.0 h
- Testing6.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2024-43781 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2024-43781 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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