Threat Intelligence / CVE / CVE-2026-41091

CVE-2026-41091

CISA KEVRansomware

CVSS 7.8 (HIGH) · EPSS 7.0% · Published 2026-05-20

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

CVSS v3 vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Weaknesses (CWE)

CWE-59

Threats tracking this CVE

CISA KEV Catalog Adds Seven Vulnerabilities (May 20, 2026) — Microsoft Defender CVE-2026-41091 (EoP) and CVE-2026-45498 (DoS) Headline Active Exploitation Batch — HIGH

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-41091

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