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CVE-2026-26106 is a remote code execution vulnerability in Microsoft Office SharePoint Server caused by improper input validation. The flaw affects SharePoint Server deployments and allows an authenticated attacker to send crafted input over the network that is insufficiently validated by the vulnerable SharePoint component. Successful exploitation enables code execution on the SharePoint server. Available reporting indicates the attacker must be authorized and possess at least Site Member permissions to trigger the issue.
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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.
9 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 caused by improper input validation; described as exploitable by authenticated attackers with Site Member permissions.
A Microsoft SharePoint Server remote code execution vulnerability due to improper input validation, exploitable by authenticated users with at least Site Member permissions.
An important Microsoft SharePoint Server remote code execution vulnerability caused by improper input validation. An authenticated attacker with Site Member permissions can execute code remotely over a network.
A notable SharePoint vulnerability in a high-urgency cluster of RCE and spoofing issues affecting on-prem SharePoint deployments.
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.