CVE-2026-109805
Weak Cryptography in SAP NetWeaver and ABAP Platform (Application Server ABAP)
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.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| SAP NetWeaver and ABAP Platform (Application Server ABAP) SAP_SE |
KRNL64NUC 7.22 (affected) 7.22EXT (affected) KRNL64UC 7.22 (affected) 7.53 (affected) KERNEL 7.22 (affected) 7.54 (affected) 7.77 (affected) 7.93 (affected) 9.16 (affected) 9.20 (affected) 9.21 (affected) Other versions: unaffected |
CNA: sap |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 6.4 medium |
CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H | CNA: sap |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://me.sap.com/notes/3786876CNA: sap
- https://url.sap/sapsecuritypatchdayCNA: sap
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