CVE-2026-27749: Avira Internet Security System Speedup Insecure Deserialization
Gen Digital Inc. · Avira Internet Security
Vendor fix available · Affected: Gen Digital Inc. Avira Internet Security · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 29% of scored CVEs
DescriptionCVE.org
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 products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- Gen Digital Inc. · Avira Internet Securityup to and including 1.1.109.1990
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- Gen Digital Inc.
- Published
- March 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-27749 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.