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A missing authentication flaw in a critical function of Microsoft 365 Copilot allows an unauthenticated attacker to disclose information over the network. The issue is classified as an information disclosure vulnerability and is exploitable with low attack complexity, no privileges, and no user interaction. Based on the available details, the vulnerable condition stems from improper enforcement of authentication on a sensitive application function, enabling unauthorized access to information that should require authenticated access.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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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.
10 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
A critical information disclosure vulnerability in Microsoft 365 Copilot that can be exploited over the network with low complexity and no privileges or user interaction.
An information disclosure vulnerability affecting Microsoft 365 Copilot, rated critical with a CVSS 3.1 score of 9.8.
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.