CVE-2026-27677
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 · uneditedDue to missing authorization checks in the SAP S/4HANA OData Service (Manage Reference Equipment), an attacker could update and delete child entities via OData services without proper authorization. This vulnerability has a high impact on integrity, while confidentiality and availability are not impacted.
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 confidenceSAP S/4HANA OData Service for Manage Reference Equipment lacks proper authorization checks, allowing authenticated attackers to update or delete child entities through OData API calls without appropriate permissions. This exposes the system to integrity violations via unauthorized data manipulation.
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
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- High
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/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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Confirm SAP S/4HANA is runningExecute transaction SM51 or use SAP MII to check the installed product version and ensure it is S/4HANAAffected if The system is running SAP S/4HANA with the Manage Reference Equipment OData service enabled
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Identify if OData service for Manage Reference Equipment is exposedCheck the OData service registration via transaction /IWFND/MAINT_SERVICE or inspect the backend OData endpoint configuration for 'ManageReferenceEquipment' or similar service nameAffected if The OData service is registered and active in the system
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Verify authorization role assignments for the OData endpointUse transaction PFCG to examine roles assigned to users accessing the OData service, checking for missing or overly permissive authorization objects related to reference equipment maintenanceAffected if Users have roles that grant access to the OData service without proper entity-level restrictions
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Check OData service authorization configurationInspect the OData service metadata or backend configuration via transaction /IWFND/GW_CLIENT to determine if authorization checks are enforced on create/update/delete operations for child entitiesAffected if The OData service configuration does not enforce authorization checks on update/delete operations for reference equipment child entities
The environment is affected if SAP S/4HANA is running with the Manage Reference Equipment OData service exposed and authorization checks are not enforced on update/delete operations for child entities.
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 dataImplement and enforce authorization checks on all OData service operations (create, update, delete) to validate user permissions before executing requests on reference equipment entities.
- Consultation3.0 h
- Implementation6.0 h
- Testing4.0 h
- Review / QA2.0 h
An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $4,224.
Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2026-27677 — 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-2026-27677 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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- Version or environment caveats, and links to real fixes
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