CVE-2026-109805

Weak Cryptography in SAP NetWeaver and ABAP Platform (Application Server ABAP)

Published Nov 10, 2026 CVSS 3.1 · 6.4 Medium EPSS < 1% KEV · Not listed
Description
Due to a weak HMAC cryptography calculation when receiving an RFC callback in SAP NetWeaver and ABAP Platform (Application Server ABAP), an authenticated attacker with high privileges and access to a network segment between application servers on an SAP system could intercept network communication between application servers and change the identity of the caller, enabling the execution of unauthorized function calls on the target server with escalated privileges leading to High impact on Confidentiality, Integrity, and Availability of the application.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

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History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Due to a weak HMAC cryptography calculation when receiving an RFC callback in SAP NetWeaver and ABAP Platform (Application Server ABAP), an authenticated attacker with high privileges and access to a network segment between application servers on an SAP system could intercept network communication between application servers and change the identity of the caller, enabling the execution of unauthorized function calls on the target server with escalated privileges leading to High impact on Confidentiality, Integrity, and Availability of the application.
Title Weak Cryptography in SAP NetWeaver and ABAP Platform (Application Server ABAP)
Weaknesses CWE-328
References
Metrics cvssV3_1

{'score': 6.4, 'vector': 'CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H'}

Subscriptions

No data.

Weaknesses

Sources

Status
PUBLISHED
Assigner
sap
Published
Updated
Nov 11, 2026, 4:55 AM
Reserved
Oct 13, 2026, 3:49 AM
Status
Awaiting Analysis
Published
Nov 10, 2026, 1:17 AM
Modified
Nov 12, 2026, 10:09 PM