# CVE-2025-42999: SAP NetWeaver Deserialization Vulnerability

Source: https://junglewise.ai/threats/cve-2025-42999-sap-netweaver-deserialization-vulnerability  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-05-15. Updated: 2026-05-09  
License: CC BY 4.0 with a link back

CVE-2025-42999 · Severity: critical · CVSS 9.1 · Exploited in the wild · Published 2025-05-15

SAP NetWeaver Visual Composer Metadata Uploader contains a deserialization vulnerability (CWE-502). A privileged attacker can upload malicious content that, when deserialized, allows for the complete compromise of the host system's confidentiality, integrity, and availability.

Technologies: [SAP NetWeaver](https://junglewise.ai/threats/technologies/netweaver). Vendors: [SAP](https://junglewise.ai/threats/vendors/sap).

## Quick answers

**Is CVE-2025-42999 exploited in the wild?** Yes. CVE-2025-42999 is known to be exploited in the wild, first recorded on 15 May 2025. Treat it as urgent.

**How severe is CVE-2025-42999?** Critical severity, with a CVSS score of 9.1, published 15 May 2025.

**Which products and versions are affected?** SAP SE NetWeaver Visual Composer Metadata Uploader 7.5.

**Is there a fix for CVE-2025-42999?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2025-42999 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2025-42999?** Check whether you run SAP NetWeaver. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- SAP SE NetWeaver Visual Composer Metadata Uploader 7.5

## Timeline

- 2025-05-12: disclosed: Initial disclosure by SAP SE
- 2025-05-15: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
- 2025-05-15: exploited: Reported as exploited in the wild

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