CVE-2025-42999
KEVRansomware UseSAP NetWeaver Deserialization Vulnerability
Description
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.
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.
CVSS 3.1 vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:HPublishedMay 13, 2025
Last modifiedAug 11, 2026
Added to KEVMay 15, 2025
Remediation dueJun 5, 2025
References
- me.sap.com/notes/3604119Permissions Required
- url.sap/sapsecuritypatchdayVendor Advisory
- onapsis.com/blog/active-exploitation-of-sap-vulnerability-cve-2025-31324/ExploitThird Party Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-42999US Government Resource
0 recent articles mention this CVE
87
Risk assessment · Critical
Actively exploited and used by ransomware crews. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 509 days
- Ransomware
- Used in known ransomware campaigns
- CVSS
- 9.1 CRITICAL
- EPSS (30-day exploit probability)
- 12.9% · top 4% of all CVEs
- Weakness
- CWE-502
- Attack vector
- Network, remotely reachable
Recommended actions
- 1.Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Review exposure: confirm which instances are reachable from the internet and restrict access until patched.
- 4.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
- 5.Verify offline/immutable backups and segment the affected systems. This flaw is used for ransomware initial access.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.