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CVE-2026-47634 is a cross-site scripting vulnerability in Microsoft Office SharePoint Server caused by improper neutralization of input during web page generation. The flaw allows attacker-controlled content to be rendered in a SharePoint web context, enabling script execution in a victim’s browser when the victim accesses maliciously crafted content or a malicious link. Microsoft classifies the issue as a spoofing vulnerability. Available reporting indicates exploitation is performed over the network by an authorized attacker with low privileges and requires user interaction.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
Patch, then assume compromise.
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.
3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Microsoft SharePoint Server spoofing vulnerability assessed by Microsoft as more likely to be exploited within 30 days.
A spoofing vulnerability in Microsoft SharePoint Server.
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.