CVE-2025-53774

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

6.5 Medium

CVE-2025-53774 is a medium vulnerability (CVSS 6.5) in Microsoft 365 Copilot Chat, published August 7, 2025. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.68%, the 53rd percentile. No source names a fixed version.

What does this mean?

Severity: 6.5 MediumCVSS 3.1, CVE List
Exploit chance: 0.68%EPSS, 53rd percentile
Exploitation: None knownNot on CISA’s or ENISA’s lists
Fixed in: No fix listedNo source names one

Description

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: Low
Integrity: Low
Availability: None

Exploit likelihood

0.68%Up 0.6 points since Aug 8, 2025

Affected products

What each source reports

CVE List Score used6.5

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

Record: CVE-2025-53774
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C
Weakness: CWE-77
Updated: 2026-11-03

EUVDEUVD-2025-239566.5

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

Record: EUVD-2025-23956
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C
Updated: 2026-11-03

GitHub AdvisoriesGHSA-hp6v-f522-x8gx6.5

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

Record: GHSA-hp6v-f522-x8gx
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness: CWE-77
Updated: 2026-11-02

NVD6.5

Microsoft 365 Copilot BizChat Information Disclosure Vulnerability

Record: CVE-2025-53774
CVSS 3.1: 6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-77
Updated: 2026-11-02

History

History
Recorded	Changed	Sources
Nov 3, 2026	facts	CVE List, EUVD
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD

Dates are when Every CVE recorded each change. Upstream dates may differ.

Description

Attack profile

How easy it is to exploit

What an attacker can affect

Exploit likelihood

Affected products

What each source reports

History

References