Advisory

A note with CVSS 10.0 for component BC-JAS-COR was released by SAP on 14.10.2025. The correction/advisory 3660659 was described with "[CVE-2025-42944] Security Hardening for Insecure Deserialization in SAP NetWeaver AS Java" and affects the system type Java.

A workaround exists, according to SAP Security Advisory team. It is advisable to implement the correction as monthly patch process.

The vulnerability addressed is insecure deserialization within Java.

Risk specification

This note has been re-released with an updated description. SAP NetWeaver AS Java may be vulnerable to remote code execution due to insecure deserialization of JDK and third-party classes. No new CVE ID is assigned for this advisory, as it serves as a security hardening measure. The CVSS score is explicitly based on the security note issued for RMI/P4 (3634501).

Solution

Deserialization of JDK and third-party classes is now restricted in SAP NetWeaver AS Java. Although an alternative solution exists, it is advisable to apply the correction! This is the workaround, which was suggested by the SAP security experts: "Follow the steps in the Note to add jdk.serialFilter parameter at the JVM level to restrict which classes can be deserialized.".

Affected System

SAP Netweaver Application Server Java is part of the SAP NetWeaver Application Platform. It provides the complete infrastructure for deploying and running Java applications.

The AS Java Home: SAP Netweaver Application Server Java wiki
A dedicated SAP NetWeaver 7.40 Application Server for Java Security Guide exists.

The advisory is valid for

SERVERCORE 7.50 ²⁷

Releated advisories

Disclaimer

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Notifications

Affected system Java

CVSS 10.0

Component BC-JAS-COR

Patch Day2025-11

Released on2025/10/14

SAP Note 3660659

Workaround Yes

Advisory

Risk specification

Solution

Affected System

Disclaimer

_{Affected system}
Java

_CVSS
10.0

_Component
BC-JAS-COR

_{Patch Day}
2025-11

_{Released
on}
2025/10/14

_{SAP Note}
3660659

_Workaround
Yes