CVE-2026-26129
M365 Copilot Information Disclosure Vulnerability
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
Improper neutralization of special elements in M365 Copilot allows an unauthorized attacker to disclose information over a network.
| Vendor | microsoft |
| Product | microsoft 365 copilot's business chat |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | May 7, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Microsoft / Microsoft 365 Copilot's Business Chat
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