SAP NetWeaver Deserialization Vulnerability (CVE-2025-42999)
Severity: critical · Patch status: unknown · Since 2025-05-15 · CVE-2025-42999
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. CISA added CVE-2025-42999 to its Known Exploited Vulnerabilities catalog on May 15, 2025, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- US federal agencies must remediate by Jun 5, 2025 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
