CVE-2026-27748: Avira Internet Security

High severity, CVSS 7.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Avira Internet Security contains an improper link resolution vulnerability in the Software Updater component. During the update process, a privileged service running as SYSTEM deletes a file under C:\\ProgramData without validating whether the path resolves through a symbolic link or reparse point. A local attacker can create a malicious link to redirect the delete operation to an arbitrary file, resulting in deletion of attacker-chosen files with SYSTEM privileges. This may lead to local privilege escalation, denial of service, or system integrity compromise depending on the targeted file and operating system configuration.

Affected products

• Avira Internet Security: before 1.1.114.3113 (fixed in 1.1.114.3113)

Published 2026-03-05. Last modified 2026-06-17.