CVE-2026-27749 - Avira Internet Security System Speedup Insecure Deserialization

CVE ID : CVE-2026-27749 Published : March 5, 2026, 3:16 p.m. | 17 minutes ago Description : Avira Internet Security contains a deserialization of untrusted data vulnerability in the System Speedup component. The Avira.SystemSpeedup.RealTimeOptimizer.exe process, which runs with SYSTEM privileges, deserializes data from a file located in C:\\ProgramData using .NET BinaryFormatter without implementing input validation or deserialization safeguards. Because the file can be created or modified by a local user in default configurations, an attacker can supply a crafted serialized payload that is deserialized by the privileged process, resulting in arbitrary code execution as SYSTEM. Severity: 8.5 | HIGH Visit the link for more details, such as CVSS details, affected products, timeline, and more...