BreachPublished 1 Jul 2026

Hackers target Microsoft 365 accounts with 81 million login attempts

Source Bleeping Computer

Description

An aggressive password-spraying campaign targeting Microsoft 365 environments generated more than 81 million login attempts over a two-week period. [...]

Impact

The impact is primarily the risk of unauthorized account access if weak or commonly used passwords are employed. Such access could lead to data exposure or account misuse. However, no direct software vulnerability or exploit is reported. The threat is a credential-based attack rather than a technical vulnerability in Microsoft 365 itself.

Defensive guidance

Organizations should enforce strong password policies, implement multi-factor authentication (MFA), and monitor for unusual login activity. Microsoft manages security for its cloud services, and users should follow recommended security best practices for Microsoft 365 accounts.

References

bleepingcomputer.com/news/security/hackers-target-microsoft-365-accounts-with-81-million-login-attempts/ (opens in a new tab)

Community reviews

Loading reviews…

Description

AI analysisMachine-generated, updated 1 Jul 2026, 16:51 UTC

References

Community reviews