PatchTheCVEMicrosoft Exchange vulnerabilities and fixes
CVEs that mention Microsoft Exchange, ranked by priority. 2 tracked.
Microsoft Exchange has 2 tracked vulnerabilities, 1 critical. A fixed release or vendor patch exists for 2. Most recent: 2026-10-22. Highest priority: CVE-2026-56191 (score 63/100).
- CVE-2026-56191 CRITICAL 10.0 MITIGATE Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over
- CVE-2026-96185 HIGH 7.5 Stack-based buffer overflow in Microsoft Exchange Online allows an authorized attacker to execute code over a
FAQ
How do I fix Microsoft Exchange vulnerabilities?
Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.
Is Microsoft Exchange being exploited right now?
None of the tracked Microsoft Exchange CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.
Which Microsoft Exchange CVE should I patch first?
CVE-2026-56191 currently ranks highest (63/100): Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to perform tampering over.
Newest Microsoft Exchange CVEs
- CVE-2026-96185 HIGH 7.5 2026-10-22: Stack-based buffer overflow in Microsoft Exchange Online allows an authorized attacker to
- CVE-2026-56191 CRITICAL 10.0 2026-07-24: Improper authentication in Microsoft Exchange Online allows an unauthorized attacker to pe