Medium severity · published Oct 13, 2026
CVE-2026-105726
Microsoft Defender Information Disclosure Vulnerability
5.5
CVSS
0.4%
EPSS
No
On KEV
Description
Out-of-bounds read in Microsoft Defender allows an authorized attacker to disclose information locally.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 37% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
MD
Microsoft Defender for Endpoint for Windows · Microsoft
1.0.0.0 before 4.18.26060.3008 · source: vendor
Affected product
MD
Microsoft Defender for Endpoint for Windows
Microsoft