CVEvulnerability

CVE-2026-41091

7.8 HIGH Known exploited Published 2026-05-20 Modified 2026-07-24 Official page ↗

CISA Known Exploited Vulnerability

Microsoft Defender Link Following Vulnerability — Microsoft Defender

Microsoft Defender contains a link following vulnerability that allows an authorized attacker to elevate privileges locally.

Added to KEV
2026-05-20
Remediation due
2026-06-03
Ransomware use
Unknown
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Notes
https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-41091 ; https://nvd.nist.gov/vuln/detail/CVE-2026-41091
Status
Analyzed
Published
2026-05-20
Last modified
2026-07-24
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-59

Description

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

Affected configurations

• microsoft malware protection engine (>= 1.1.26030.3008 < 1.1.26040.8)

Related

Weakness · CWE (1)

  • CWE-59 Improper Link Resolution Before File Access weakness

References