5.5Medium

CVE-2026-70264Microsoft Defender Information Disclosure Vulnerability

Microsoft Windows Defender Published: 2026-10-13 22:01 (29 days ago)

Description

Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to disclose information locally.

Weakness (CWE): CWE-59

Data: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Published as the sources state it, in English.

Affected products and versions

Vendor	Product	Versions
Microsoft	Windows Defender	< 1.1.26090.9

References and patches

Microsoft Defender Information Disclosure Vulnerability vendor-advisorypatch

CVSS score

5.5Medium

Source: microsoft · CVSS 3.1

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

All scores (2)

cna	CVSS 3.1	5.5Medium
secure@microsoft.com	CVSS 3.1	5.5Medium

EPSS (chance of exploitation in 30 days)

0.49%

higher than 42% of all CVEs

CISA assessment (SSVC)

Exploitation: none
Automatable: no
Technical impact: partial

Timeline

ID reserved2026-08-03
Published2026-10-13 22:01
Reached IP-DB2026-10-24 23:46
Last updated2026-11-10 23:43

Assigned by (CNA): microsoft
NVD status: Awaiting Analysis

View at source: CVE.org · NVD

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