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CVE-2026-21521

Word Copilot Information Disclosure Vulnerability

Improper neutralization of escape, meta, or control sequences in Copilot allows an unauthorized attacker to disclose information over a network.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 Word Copilot
CVE-2025-59252

M365 Copilot Information Disclosure Vulnerability

Improper neutralization of special elements used in a command ('command injection') in Copilot allows an unauthorized attacker to disclose information over a network.

CVSS 3.1 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Microsoft
Products
365 365 Copilot 365 Word Copilot