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CVE-2025-42999: SAP NetWeaver Deserialization Vulnerability

criticalknown exploitedCVE-2025-42999
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: SAPproduct: NetWeaverUnsafe deserialization
What
A deserialization vulnerability allows a privileged attacker to compromise the system's confidentiality, integrity, and availability.
Who is affected
Deployments of SAP NetWeaver that utilize the Visual Composer Metadata Uploader.
Urgency
Immediate remediation is necessary due to active exploitation and critical severity.
Action
Apply the latest security patch from SAP to mitigate the risk.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-05-15
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-42999

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-42999coverage & exploitation statusNVD · CVE.org

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