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CVE-2025-42999 is a critical insecure deserialization vulnerability in SAP NetWeaver Visual Composer Metadata Uploader. The flaw allows deserialization of untrusted or malicious content uploaded through the Visual Composer metadata upload functionality. Public reporting indicates the issue affects SAP NetWeaver systems with the Visual Composer component enabled, and exploitation has been associated with the Visual Composer development server. A privileged or highly privileged authenticated attacker can supply crafted serialized data that is processed by the vulnerable component, potentially triggering attacker-controlled code execution during deserialization. The vulnerability has been described as addressing the underlying root cause related to the earlier Visual Composer exploitation activity tied to CVE-2025-31324. Successful exploitation can compromise the confidentiality, integrity, and availability of the host system and may lead to full system takeover.
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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.
58 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.