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

Project Subscriptions

Vendors Products
Microsoft Subscribe
365 Word Copilot Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Mon, 02 Feb 2026 13:45:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:microsoft:365_word_copilot:-:*:*:*:*:*:*:*

Fri, 23 Jan 2026 20:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 22 Jan 2026 23:00:00 +0000

Type Values Removed Values Added
Description Improper neutralization of escape, meta, or control sequences in Copilot allows an unauthorized attacker to disclose information over a network.
Title Word Copilot Information Disclosure Vulnerability
First Time appeared Microsoft
Microsoft 365 Word Copilot
Weaknesses CWE-150
CPEs cpe:2.3:a:microsoft:365_word_copilot:*:*:*:*:*:*:*:*
Vendors & Products Microsoft
Microsoft 365 Word Copilot
References
Metrics cvssV3_1

{'score': 7.4, 'vector': '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'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: microsoft

Published:

Updated: 2026-01-30T03:40:06.091Z

Reserved: 2025-12-30T18:10:54.846Z

Link: CVE-2026-21521

cve-icon Vulnrichment

Updated: 2026-01-23T20:02:10.801Z

cve-icon NVD

Status : Analyzed

Published: 2026-01-22T23:15:57.823

Modified: 2026-02-02T13:30:53.350

Link: CVE-2026-21521

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses