Out-of-band Exchange Server update fixes high-severity mailbox access bug (CVE-2026-96940)

Microsoft has pushed out an out-of-band security update for Exchange Server that fixes a high-severity vulnerability (CVE-2026-96940) that may allow authenticated attackers to read emails and attachments of other users in the same organization, but “does not allow access across tenant boundaries.” CVE-2026-96940 was discovered internally and, according to the Exchange Server Team, they “are not aware of active exploitation.” Nevertheless, Microsoft thinks that the flaw could be consistently expl