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SAP S/4HANA CVE-2026-66764

| EUVDEUVD-2026-55881 MEDIUM
Authorization Bypass Through User-Controlled Key (CWE-639)
2026-08-11 sap GHSA-f866-c6jw-4pqx
4.3
CVSS 3.1 · Vendor: sap
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Severity by source

Vendor (sap) PRIMARY
4.3 MEDIUM
AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
vuln.today AI
4.3 MEDIUM

Authenticated network access required (PR:L, AV:N); impact strictly limited to low confidentiality exposure with no integrity or availability effect per description.

3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (sap).

CVSS VectorVendor: sap

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

Lifecycle Timeline

2
Analysis Generated
Aug 11, 2026 - 01:10 vuln.today
CVE Published
Aug 11, 2026 - 00:18 cve.org
MEDIUM 4.3

DescriptionCVE.org

Reprocess Bank Statement Items in SAP S/4HANA does not perform the necessary authorization checks for authenticated users, allowing them to use rules that have not been shared with them, resulting in privilege escalation.This vulnerability has a low impact on confidentiality, with no impact on integrity and availability of the application

AnalysisAI

Privilege escalation in SAP S/4HANA's Reprocess Bank Statement Items component allows authenticated users to invoke processing rules that have not been explicitly shared with them, circumventing intended access controls. Affected versions span S4CORE releases 104 through 109, covering a broad swath of actively supported SAP S/4HANA deployments. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
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Delivery
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Exploit
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Execution
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Impact
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Vulnerability AssessmentAI

Exploitation Exploitation requires a valid authenticated SAP S/4HANA user account with at minimum the ability to access the Reprocess Bank Statement Items transaction (PR:L per CVSS vector). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 4.3 (Medium) with vector AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N accurately characterizes this as a moderate, authenticated network-accessible vulnerability with limited confidentiality impact and no integrity or availability exposure. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation The primary remediation is to apply the fix delivered in SAP Security Note 3669608, accessible through the SAP Support Portal at https://me.sap.com/notes/3669608. … Detailed patch versions, workarounds, and compensating controls in full report.

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CVE-2026-66764 vulnerability details – vuln.today

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