Recorded 15 Oct 2026 at 01:07 UTC. This is what ChangeIntel recorded, including the title, summary, facts and links. It is not a statement of the source's current position.
See the latest record.
The historical field “Public exploit code” recorded Nuclei detection-template membership. It did not establish exploit availability. The original recorded fields remain below.
The historical “Publicly disclosed: No” field could represent a missing MSRC assessment. It does not establish that the vulnerability was undisclosed. The original recorded fields remain below.
CVEMicrosoft Security Response Center
Microsoft 365 Copilot Business Chat Information Disclosure Vulnerability
Improper neutralization of special elements used in a command ('command injection') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to disclose information over a network.
CWE-77: Improper Neutralization of Special Elements used in a Command ('Command Injection')
Issued by
Microsoft
Customer action
Not required (service-side fix)
Affected products
Microsoft 365 Copilot's Business Chat
Updates that fix it
No KB listed
CISA KEV
Not listed in the collected catalog
EPSS
0.5%; scored 14 Oct 2026
Public exploit code
No Nuclei template listed
Published
17 Sep 2026 07:00 UTC
Last revised
13 Oct 2026 07:00 UTC
Revision note
Updated the CVSS User Interaction metric from Required (UI:R) to None (UI:N). The CVSS base score has increased to 8.6. This is an informational change only. No customer action is required.
Complete at observationRead 15 Oct 2026 at 01:07 UTC
CISA KEV
Complete at observationRead 15 Oct 2026 at 01:07 UTC
FIRST EPSS
Complete at observationRead 15 Oct 2026 at 01:07 UTC
Public detection templates (Nuclei)
Complete at observationRead 15 Oct 2026 at 01:07 UTC
Coverage describes the sources at this observation. A complete read then does not establish their current position.
What changed
Publisher revision note: Updated an acknowledgement. This is an informational change only. → Updated the CVSS User Interaction metric from Required (UI:R) to None (UI:N). The CVSS base score has increased to 8.6. This is an informational change only. No customer action is required. · CVSS 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 → CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N/E:U/RL:O/RC:C · CVSS score: 7.4 → 8.6
Page history
Changes are dated when recorded; day views use the last saved version from that UTC day, and citations stay fixed.
14 Oct 2026 · 15:58:54 UTCRevision noteUpdated an acknowledgement. This is an informational change only. → Updated the CVSS User Interaction metric from Required (UI:R) to None (UI:N). The CVSS base score has increased to 8.6. This is an informational change only. No customer action is required.