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discoveredarbitrary file delete as SYSTEMLPE before Windows 24H2system integrity compromise

CVE-2026-27748

Avira Software Updater arbitrary file deletion

Avira Software Updater followed an attacker-controlled symbolic link while deleting an OPSWAT component as SYSTEM, yielding arbitrary file deletion and, before Windows 24H2, a Config.msi LPE path. Avira 1.1.109.1990 and below were affected; 1.1.114.3113 contains the fix.

Vendor
Gen Digital / Avira
Product
Avira Internet Security
Component
Software Updater
Disclosure
Mar 03, 2026
Bug class
symlink following, improper link validation
Severity
High (CVSS 3.1: 7.8)
writeupadvisory

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