Product by Microsoft
Exchange Online
5 known vulnerabilities in Exchange Online (Microsoft), 0 of them actively exploited (CISA KEV).
Key figures
5
Vulnerabilities
0
Actively exploited (KEV)
0
Used by ransomware
4
Critical
Vulnerabilities
Actively exploited vulnerabilities (CISA KEV) first, then by priority. Click a column header to re-sort the table.
| Critical | CVE-2026-65801 | Microsoft Exchange Online Elevation of Privilege Vulnerability | 10.0 | |
| Critical | CVE-2026-56191 | Microsoft Exchange Online Tampering Vulnerability | 10.0 | |
| Critical | CVE-2026-48579 | Microsoft Exchange Online Information Disclosure Vulnerability | 9.1 | |
| Critical | CVE-2026-48582 | Microsoft Exchange Online Elevation of Privilege Vulnerability | 9.6 | |
| High | CVE-2026-54998 | Microsoft Exchange Online Elevation of Privilege Vulnerability | 8.8 |
News
- @RISK®: The Consensus Security Vulnerability Alert: Vol. 26, Num. 33sans-atrisk-mail,
- Microsoft Patches 22 Vulnerabilities, Including Critical RCE Flaw in Entra IDsans-newsbites-mail,
- @RISK®: The Consensus Security Vulnerability Alert: Vol. 26, Num. 29sans-atrisk-mail,
- @RISK®: The Consensus Security Vulnerability Alert: Vol. 26, Num. 27sans-atrisk-mail,
- NCSC-2026-0234 [1.00] [M/H] Kwetsbaarheden verholpen in Microsoft Exchangencsc-nl,
- @RISK®: The Consensus Security Vulnerability Alert: Vol. 26, Num. 25sans-atrisk-mail,