SAP NetWeaver Deserialization Vulnerability

[ Why it matters ]Priority signals

• Exploited in the wild: on CISA's Known Exploited Vulnerabilities list since 2025-05-15
• Known to be used in ransomware campaigns
• EPSS: 13% chance of exploitation in the next 30 days (higher than 96% of CVEs)
• Critical severity: CVSS 9.1

[ Description ]Official 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: 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.

[ Fixes ]Fixes and patches

CISA required action (US federal deadline 5 Jun 2025): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ References ]References

• me.sap.com/notes/3604119Permissions Required
• url.sap/sapsecuritypatchdayVendor Advisory
• onapsis.com/blog/active-exploitation-of-sap-vulnerability-cve-2025-31324ExploitThird Party Advisory
• www.cisa.gov/known-exploited-vulnerabilities-catalogUS Government Resource