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CVE-2025-42999 is a critical insecure deserialization vulnerability in SAP NetWeaver Visual Composer Metadata Uploader. The flaw arises when the component deserializes untrusted or malicious serialized content supplied through the metadata upload functionality. Available reporting indicates exploitation requires a privileged or authenticated attacker with sufficient access to upload crafted content to the vulnerable Visual Composer component. Successful exploitation can lead to arbitrary code execution and full compromise of the affected host, impacting confidentiality, integrity, and availability. The issue affects SAP NetWeaver instances with the Visual Composer component enabled and is associated with the same Visual Composer attack surface involved in CVE-2025-31324; public reporting also indicates SAP Security Note 3604119 addresses this vulnerability and the underlying root cause tied to that attack path.
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What an attacker gets, and what they’ve been doing with it.
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No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
57 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A SAP NetWeaver vulnerability used in a public exploit chain to bypass authentication and achieve RCE (when chained with CVE-2025-31324).
SAP NetWeaver critical flaw used in a chained exploit with CVE-2025-31324 to bypass authentication and achieve remote code execution.
A critical vulnerability addressed by SAP Security Note 3604119, described as the underlying root cause behind CVE-2025-31324 and associated with insecure deserialization. It was added to CISA's KEV catalog, indicating exploitation in the wild.
A critical remote code execution vulnerability in SAP NetWeaver, with a high EPSS score (0.97), indicating high likelihood of exploitation.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.