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CVE-2026-41091: Microsoft Defender Link

Status: KEV  |  Advisory ID: CVE-2026-41091

Key Details

CVECVE-2026-41091
Affected productsMicrosoft Defender
Exploitation statusListed in CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating confirmed active exploitation.
Classified asCWE-59 (Improper Link Resolution Before File Access ('Link Following'))
KEV listingAdded to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-05-20.
Exploitation prediction (EPSS)8% probability of exploitation in the next 30 days (95% percentile) -- FIRST.org's EPSS model.
Federal remediation deadline2026-06-03 (CISA KEV, Binding Operational Directive).

What to Know

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

References

SourceReference
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2026-41091