CVE-2026-27749

CVE-2026-27749 affects Avira Internet Security, specifically the System Speedup component. The vulnerability arises from deserialization of untrusted data by the privileged process Avira.SystemSpeedup.RealTimeOptimizer.exe (running as SYSTEM) which reads a file under C:\ProgramData and deserializ...

CVE-2026-27750

Avira Internet Security is affected by a TOCTOU vulnerability in the Optimizer component. A privileged service running as SYSTEM identifies directories for cleanup during a scan phase and later deletes them in a separate cleanup phase without revalidating the target path. An local attacker could ...

CVE-2026-27748

CVE-2026-27748 relates to Avira Internet Security’s Software Updater. The vulnerability stems from improper link resolution: a SYSTEM‑level updater process may delete a file under C:\ProgramData by following symbolic links or reparse points, allowing a local attacker to redirect the delete to an ...