# CVE-2025-42999: Insecure Deserialization in SAP NetWeaver (Visual Composer development server)

> CVE-2025-42999: Insecure Deserialization in SAP NetWeaver (Visual Composer development server). CVSS 9.1 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2025-42999
Last updated: 2026-08-11T04:17:17Z

- Published: 2025-05-13 00:17 UTC · Updated: 2026-08-11 04:17 UTC · Assigner: sap
- CVSS: 9.1 (CVSS 3.1) · Severity: Critical · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
- EPSS: 12.9%, 96th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2025-05-15, federal due date 2025-06-05, ransomware use: Known
- CWE: CWE-502

## Description

SAP NetWeaver Visual Composer Metadata Uploader is vulnerable when a privileged user can upload untrusted or malicious content which, when deserialized, could potentially lead to a compromise of confidentiality, integrity, and availability of the host system.

## CISA required action

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

## Affected vendors and products

- SAP\_SE: SAP NetWeaver (Visual Composer development server)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2025-42999)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2025-42999)
- [https://me.sap.com/notes/3604119](https://me.sap.com/notes/3604119)
- [https://url.sap/sapsecuritypatchday](https://url.sap/sapsecuritypatchday)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2025-42999 · Markdown: https://rewindex.com/cve/CVE-2025-42999.md · JSON: https://rewindex.com/api/v1/cves/CVE-2025-42999 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:09:56.875Z