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3C
Product
365 Copilot Chat
by Microsoft · last CVE Sep 17, 2026
8
CVEs
0
On KEV
9.9
Max CVSS
0
New 30D
Vulnerabilities8In the news0Timeline
Severity mix
Critical 3High 5Medium 0Low 0
Severity
All severities8Critical3High5Medium0Low0
Exploitation
On CISA KEV0Exploited in the wild0
Watch

Add 365 Copilot Chat to your stack to get only the CVEs that touch what you run.

CVECVSSEPSSPublishedSummary · affected versions
CVE-2026-26137
9.9
1%
Mar 19
Microsoft Exchange Elevation of Privilege Vulnerability
Affected: All versions, or not specified
CVE-2025-59286
9.3
1%
Oct 9
Copilot Information Disclosure Vulnerability
Affected: All versions, or not specified
CVE-2025-59272
9.3
1%
Oct 9
Copilot Information Disclosure Vulnerability
Affected: All versions, or not specified
CVE-2026-78501
8.6
1%
Sep 17
Microsoft 365 Copilot Business Chat Information Disclosure Vulnerability
Affected: All versions, or not specified
CVE-2026-26129
7.5
1%
May 7
M365 Copilot Information Disclosure Vulnerability
Affected: All versions, or not specified
CVE-2026-26164
7.5
1%
May 7
M365 Copilot Information Disclosure Vulnerability
Affected: All versions, or not specified
CVE-2025-53787
7.5
1%
Aug 7
Microsoft 365 Copilot BizChat Information Disclosure Vulnerability
Affected: All versions, or not specified
CVE-2025-53774
7.5
1%
Aug 7
Microsoft 365 Copilot BizChat Information Disclosure Vulnerability
Affected: All versions, or not specified
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