Medium severity · published Apr 14, 2026
CVE-2026-27679
Missing Authorization check in SAP S/4HANA Frontend OData Service (Manage Reference Structures)
6.5
CVSS
0.2%
EPSS
No
On KEV
Description
Due to missing authorization checks in the SAP S/4HANA frontend OData Service (Manage Reference Structures), an attacker could update and delete child entities via exposed OData services without proper authorization. This vulnerability has a high impact on integrity, while confidentiality and availability are not impacted.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 8% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SS
SAP S/4HANA Frontend OData Service (Manage Reference Structures) · SAP_SE
UIS4H 109 · source: vendor
MR
Manage Reference Structures · Sap
uis4h_109 · source: NVD
Affected product
SS
SAP S/4HANA Frontend OData Service (Manage Reference Structures)
SAP_SE