High severity · published Oct 22, 2026
CVE-2026-96185
Microsoft Exchange Online Remote Code Execution Vulnerability
New
7.5
CVSS
0.5%
EPSS
No
On KEV
Description
Stack-based buffer overflow in Microsoft Exchange Online allows an authorized attacker to execute code over a network.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
High
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 45% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
ME
Microsoft Exchange Online · Microsoft
All versions, or not specified · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-96185
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-96185
msrc.microsoft.com
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96185
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