ClosedPatched

SAP NetWeaver: NetWeaver Deserialization Vulnerability

SAP NetWeaver

SAP NetWeaver Visual Composer Metadata Uploader contains a deserialization vulnerability that allows a privileged attacker to compromise the confidentiality, integrity, and availability of the host system by deserializing untrusted or malicious content. Added to CISA KEV on 2025-05-15.

Why this severity: CVSS 9.1 (CNA, v3.1); actively exploited (CISA KEV); known ransomware use

Started: May 15, 2025
Closed: May 15, 2025
CVE: CVE-2025-42999

Follow this incident

Updated May 15, 2025

Affected

See vendor advisory / CISA notes (versions not always listed in KEV feed)

Fixed in

See vendor advisory linked in sources

Timeline1

May 15, 2025
CISA added CVE-2025-42999 to the KEV catalog (due 2025-06-05).

Advisories3

Notes & caveats

Derived from CISA KEV JSON feed catalogVersion 2026.10.21. CVSS from the CVE record (cvelistV5). Exact affected/fixed version strings are not always in the KEV record; verify against the vendor advisory URL. startedAt uses dateAdded (exploitation may have begun earlier; many entries are older CVEs newly confirmed as exploited in 2025).

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