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// CVE · PUBLISHED 2026-07-24

CVE-2026-56191

Microsoft / Microsoft Exchange Online

10.0 · CVSS 3.1Critical

Description

Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.

References

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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.