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CVE-2026-45481 is a Microsoft Office SharePoint / SharePoint Server vulnerability caused by improper neutralization of input during web page generation, i.e., a cross-site scripting (XSS) flaw. According to the provided advisory context, the issue allows an authorized attacker to inject malicious web content that is rendered in a SharePoint context, enabling spoofing over the network. The available information does not identify a specific vulnerable function or code path, but it does establish that exploitation requires authenticated access and user interaction, specifically convincing a user to open a malicious link.
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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.
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.
2 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.