Description

Improper neutralization of special elements in output used by a downstream component ('injection') in M365 Copilot allows an unauthorized attacker to disclose information over a network.

INFO

Published Date :

2026-05-07T20:58:09.538Z

Last Modified :

2026-05-08T13:52:02.167Z

Source :

microsoft
AFFECTED PRODUCTS

The following products are affected by CVE-2026-26164 vulnerability.

Vendors Products
Microsoft
  • 365 Copilot Business Chat
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-26164.

URL Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26164 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Scope
Confidentiality Impact
Integrity Impact
Availability Impact