CVE-2026-21521
Word Copilot Information Disclosure Vulnerability
- State
- Published
- Severity
- 7.4 High
- Published
- Jan 22, 2026
- Updated
- Jul 30, 2026
- Reserved
- Dec 30, 2025
Description
Improper neutralization of escape, meta, or control sequences in Copilot allows an unauthorized attacker to disclose information over a network.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 7.4 High | 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 | microsoft |
Weaknesses
- CWE-150 Improper Neutralization of Escape, Meta, or Control Sequences
Affected Products
| Product | Versions |
|---|---|
Microsoft 365 Word CopilotMicrosoft |
|
References
- Word Copilot Information Disclosure Vulnerabilityvendor-advisorypatch
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