CVE-2026-78501
Microsoft 365 Copilot Business Chat Information Disclosure Vulnerability
Published Sep 17, 2026 · updated Oct 14, 2026 · Microsoft Microsoft 365 Copilot's Business Chat
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.
Timeline
Detection, updates, and resolution for this record.
Sep 17, 2026 · NIST NVD
Detected
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.
Oct 14, 2026 · NIST NVD
Updated
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.
Affected
- cpe microsoft/365 copilot chatversion unspecified
- vendor Microsoft Microsoft 365 Copilot's Business Chatversion unspecified
Sources
- CIRCL Vulnerability LookupCVE-2026-78501
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.
vulnerability.circl.lu - CVE.orgCVE-2026-78501
Official CVE identifier
cve.org - FIRST EPSSCVE-2026-78501
30-day exploitation probability 0.5%
first.org - NIST NVDCVE-2026-78501
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.
nvd.nist.gov