CVE-2026-21521
Word Copilot Information Disclosure Vulnerability
CVSS Score
7.4
EPSS Score
0.0%
EPSS Percentile
0th
Improper neutralization of escape, meta, or control sequences in Copilot allows an unauthorized attacker to disclose information over a network.
| Vendor | microsoft |
| Product | microsoft 365 word copilot |
| Ecosystems | |
| Industries | TechnologyEnterprise |
| Published | Jan 22, 2026 |
| Last Updated | Apr 1, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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 Word Copilot
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