Advisory

A note with CVSS 10.0 for component BC-CST-DP was released by SAP on 08.09.2026. The correction/advisory 3747649 was described with "[CVE-2026-44756] Memory Corruption vulnerability in SAP Extended Passport (EPP) Processing" and affects the system type Kernel / Web Dispatcher.

A workaround exists, according to SAP Security Advisory team. It is advisable to implement the correction as none.

The vulnerability addressed is memory corruption vulnerability within Kernel / Web Dispatcher.

Risk specification

A memory safety vulnerability exists in the Extended Passport Protocol (EPP) processing library. Under certain conditions, an unauthenticated attacker could exploit this vulnerability by sending a crafted network request with a malformed EPP header, potentially leading to undefined behavior and abnormal program termination. Successful exploitation could have a high impact on the confidentiality, integrity, and availability of the application.

Solution

The correction introduces proper length validation for all externally provided length fields processed during EPP deserialization, preventing memory safety violations caused by malformed input data. Please refer to SAP Note [3776034] "FAQ Note for SAP Security Note 3747649" for frequently asked questions. SAP NetWeaver AS ABAP and Java Correction The correction is initially delivered with the kernel patch level specified in the "Support Package Patches" section of this SAP Note. All higher patch levels also include the correction. The correction is delivered with the following kernel archives: hotfix - file dw\.sar SP Stack Kernel - files SAPEXE.SAR and SAPEXEDB.SAR SAPWEBDISP.SAR Follow the SAP recommendations on how to select and install the kernel patch: Apply the latest SP Stack Kernel if it contains the correction. For the list of current SP Stack Kernels, see SAP Note 2083594 (SAP Kernel Versions and SAP Kernel Patch Levels). Otherwise, the next SP Stack Kernel will include the correction. Apply the hotfix only if you require the correction on short notice. The correction may not be available for kernel releases that are no longer maintained. Please upgrade to the corresponding downward compatible kernel (DCK), see SAP Note 2083594 (SAP Kernel Versions and SAP Kernel Patch Levels). Review the regression note for the target patch level before installing the patch. For details, see SAP Note 1802333 (Finding information about regressions in the SAP kernel). For instructions on how to download and install kernel patches, see SAP Note 19466 (Downloading SAP kernel patches). The paper Update Strategy for the Kernel of the Application Server ABAP in On Premise Landscapes provides detailed SAP recommendations. Also install the latest patch level of SAP Host Agent. Correction SAP Web Dispatcher Use SAPWEBDISP.SAR to patch standalone SAP Web Dispatcher and follow SAP Note 908097. It provides details about the recommended SAP Web Dispatcher version and how to download and install the patch. See SAP Note 3115889 for the differences between standalone and embedded deployments of SAP Web Dispatcher. Use dw\.sar or SAPEXE.SAR and SAPEXEDB.SAR to patch embedded SAP Web Dispatcher as described for patching SAP NetWeaver Application Server. Although an alternative solution exists, it is advisable to apply the correction! This is the workaround, which was suggested by the SAP security experts: "Assess the workaround applicability for your SAP landscape prior to implementation. Note that this workaround is a temporary fix and is not a permanent solution. SAP strongly recommends you apply the corrections outlined in the security note, which can be done in lieu of the workaround or after the workaround is implemented. Workaround is available only for HTTP traffic received via SAP Web Dispatcher. See SAP Note 3756304 for details.".

The advisory is valid for

KERNEL 7.22 ⁴²
KERNEL 7.53 ⁶⁵
KERNEL 7.54 ⁴⁴
KERNEL 7.77 ⁶¹
KERNEL 7.89 ³⁹
KERNEL 7.93 ³⁷
KERNEL 8.04 ¹⁷
KERNEL 9.16 ¹⁶
KERNEL 9.18 ⁹
KERNEL 9.19 ⁸
KERNEL 9.20 ⁵
KRNL64NUC 7.22 ⁴⁸
KRNL64NUC 7.22EXT ⁴⁸
KRNL64UC 7.22 ⁴⁸
KRNL64UC 7.22EXT ⁴⁸
KRNL64UC 7.53 ⁶⁵
KRNL64UC 8.04 ¹⁸
WEBDISP 9.16 ³
WEBDISP 9.18
WEBDISP 9.19
WEBDISP 9.20

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