What’s Vulnerable › Products

Microsoft 365 Copilot's Business Chat vulnerabilities

8 known vulnerabilities, 0 confirmed exploited in the wild (CISA KEV), 8 published in the last 12 months.

Check whether your Microsoft 365 Copilot's Business Chat version is affected

Latest Microsoft 365 Copilot's Business Chat vulnerabilities

• CVE-2026-78501 — Microsoft 365 Copilot Business Chat Information Disclosure Vulnerability (CVSS 8.6)
• CVE-2026-26164 — M365 Copilot Information Disclosure Vulnerability (CVSS 7.5)
• CVE-2026-26129 — M365 Copilot Information Disclosure Vulnerability (CVSS 7.5)
• CVE-2026-26137 — Microsoft Exchange Elevation of Privilege Vulnerability (CVSS 9.9)
• CVE-2025-59286 — Copilot Information Disclosure Vulnerability (CVSS 9.3)
• CVE-2025-59272 — Copilot Information Disclosure Vulnerability (CVSS 9.3)
• CVE-2025-53787 — Microsoft 365 Copilot BizChat Information Disclosure Vulnerability (CVSS 7.5)
• CVE-2025-53774 — Microsoft 365 Copilot BizChat Information Disclosure Vulnerability (CVSS 7.5)