CVE-2026-27748

Description

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.

Weakness classification

• security@nortonlifelock.com: CWE-59

Primary references

• security@nortonlifelock.com — Release Notes
• security@nortonlifelock.com — Product
• security@nortonlifelock.com