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CVE-2026-26133highCWE-77

M365 Copilot Information Disclosure Vulnerability

21Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 7.1epss 0.4%
exploitation probability
0.4%top 63% of all CVEs
observed exploitation
nono source reports it
AI command injection in M365 Copilot allows an unauthorized attacker to disclose information over a network.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N/E:U/RL:O/RC:C