---
id: CVE-2025-53774
title: Microsoft 365 Copilot BizChat Information Disclosure Vulnerability
summary: Microsoft 365 Copilot BizChat Information Disclosure Vulnerability
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C'
cvssSource: cna
cwe:
  - CWE-77
vendor: Microsoft
product: Microsoft 365 Copilot's Business Chat
affected:
  - 365_copilot_s_business_chat -
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2025-08-13T15:04:02.942124Z'
published: '2025-08-07'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T22:03:05.896Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-53774'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53774'
    label: Microsoft 365 Copilot BizChat Information Disclosure Vulnerability
tags:
  - cve.org
epss: 0.00629
epssPercentile: 0.50338
ingestedAt: '2026-11-05T20:33:06.563Z'
---

## Overview

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

## Affected

- `365_copilot_s_business_chat -`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.