CVE-2018-11461
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 808D V4.7 (All versions), SINUMERIK 808D V4.8 (All versions), SINUMERIK 828D V4.7 (All versions < V4.7 SP6 HF1), SINUMERIK 840D sl V4.7 (All versions < V4.7 SP6 HF5), SINUMERIK 840D sl V4.8 (All versions < V4.8 SP3). A local attacker with user privileges could use the service command application for privilege escalation to an elevated user but not root. The security vulnerability could be exploited by an attacker with local access to the affected systems. Successful exploitation requires user privileges but no user interaction. The vulnerability could allow an attacker to compromise confidentiality, integrity and availability of the system. At the time of advisory publication no public exploitation of this security vulnerability was known.
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 confidenceLocal privilege escalation vulnerability in Siemens SINUMERIK CNC systems (808D, 828D, 840D sl) where an attacker with standard user privileges can exploit the service command application to gain elevated user (but not root) privileges. Requires local access to the affected system.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE dataall versionsall versions<= 4.7<= 4.7<= 4.8CVSS 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
- Low
- Integrity
- High
- Availability
- Low
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:L
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 model and firmware versionAccess the HMI system information or maintenance menu (typically via 'System' > 'Diagnostics' or 'Service' > 'System Info') and record the exact model number (808D, 828D, or 840D sl) and firmware version displayedAffected if The model is 808D with V4.7 or V4.8, 828D with V4.7, or 840D sl with V4.7 or V4.8 (any version within these ranges)
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Confirm the service command application is accessibleLocate the service command or service maintenance application within the HMI menu structure (typically under 'Service' or 'Maintenance' functions). Determine if a standard user account can access this applicationAffected if The service command application is available and accessible to standard user accounts on the system
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Check current user privilege levelLog in with a standard (non-administrator) user account and verify the current privilege level. Note whether the account has user-level access but not elevated/system privilegesAffected if You are logged in with a standard user account that has limited privileges but can access the service command application
You are affected if your SINUMERIK system matches one of the affected models (808D V4.7/V4.8, 828D V4.7, 840D sl V4.7/V4.8) AND the service command application is accessible to standard user accounts on your local network.
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.
From vendor dataApply vendor-supplied patches: Update SINUMERIK 828D to V4.7 SP6 HF1 or later, SINUMERIK 840D sl V4.7 to V4.7 SP6 HF5 or later, and V4.8 to V4.8 SP3 or later. Restrict physical and local access to affected systems as a compensating control.
- Consultation6.0 h
- Implementation12.0 h
- Testing8.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2018-11461 — 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-2018-11461 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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