Description
Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Microsoft Exchange Online | - | — |
Advisories 2
- WID-SEC-2026-2502 Microsoft Azure, Copilot, Exchange, Surface: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 26, 2026
- MSRC-CVE-2026-56191 Microsoft Exchange Online Tampering Vulnerability Microsoft Security Response Center · Jul 23, 2026
References
- Microsoft Exchange Online Tampering Vulnerability vendor-advisory patch