CVEvulnerability

CVE-2026-27749

7.8 HIGH Published 2026-03-05 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2026-03-05
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
7.8 HIGH — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weaknesses
CWE-502

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.

Affected configurations

• avira internet security (< 1.1.114.3113)

Related

Weakness · CWE (1)

  • CWE-502 Deserialization of Untrusted Data weakness

References