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CVE-2025-30382 is a remote code execution vulnerability in Microsoft SharePoint Server caused by deserialization of untrusted data. Available reporting describes the flaw as arising in SharePoint metadata processing workflows, including code paths associated with the Microsoft.SharePoint.Client.ServerRuntime namespace, where attacker-controlled serialized data may be processed without sufficient validation. The issue is associated with unsafe handling of serialized .NET objects, including use of BinaryFormatter-style deserialization, which can permit construction of malicious object graphs and execution of attacker-controlled code during deserialization. The vulnerability has been described as affecting on-premises SharePoint deployments, including SharePoint Server Subscription Edition, and Microsoft rated exploitation as more likely.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A remote code execution vulnerability in Microsoft SharePoint Server that Microsoft assesses as more likely to be exploited within 30 days.
A SharePoint deserialization remote code execution vulnerability noted as part of Microsoft SharePoint's recurring history of deserialization flaws.
A remote code execution vulnerability in Microsoft SharePoint Server.
A Microsoft SharePoint Server remote code execution vulnerability assessed as exploitation more likely.
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.