Insecure Deserialization RCE in SAP NetWeaver RMI-P4
CVE-2025-42944 is a critical insecure deserialization vulnerability in SAP NetWeaver AS Java, specifically affecting the RMI-P4/ServerCore component. An unauthenticated attacker can send a malicious serialized Java object to an exposed RMI-P4 service port, where untrusted data is deserialized without sufficient validation. Public reporting describes the issue as affecting NetWeaver AS Java, including references to ServerCore 7.50, and enabling arbitrary OS command execution through crafted payloads delivered over the P4 protocol. SAP later issued additional hardening guidance and protections, including a JVM-wide deserialization filter (jdk.serialFilter) to block dangerous classes/packages.
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Impact, mitigation & remediation
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Impact
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Mitigation
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Exploits
No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
Recent activity
49 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical deserialization vulnerability in SAP NetWeaver that can enable unauthenticated attacks (per the content snippet).
A critical insecure deserialization vulnerability in SAP NetWeaver AS Java, addressed by security hardening.
A critical vulnerability in SAP NetWeaver, addressed with updates in November 2025. Specific technical details are not provided in the content.
A maximum-severity insecure deserialization vulnerability in SAP NetWeaver AS Java that allows unauthenticated attackers to execute arbitrary OS commands via the RMI-P4 module.
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Cross-references every affected SKU, including bundled OEM variants.
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