CVE-2026-27749

Published: Mar 05, 2026 Last Modified: Mar 13, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 8,5
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: low
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
HIGH 7,8
Source: [email protected]
Attack Vector: local
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

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.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0004
Percentile
0,1th
Updated

EPSS Score Trend (Last 10 Days)

502

Deserialization of Untrusted Data

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Integrity Availability Other
Potential Impacts:
Modify Application Data Unexpected State Dos: Resource Consumption (Cpu) Varies By Context
Applicable Platforms
Languages: Java, JavaScript, PHP, Python, Ruby
Technologies: AI/ML, ICS/OT, Not Technology-Specific
Likelihood of Exploit: Medium
View CWE Details
Application

Internet Security by Avira

Product Information
Vendor Avira
Product Internet Security
Version Range Affected
To 1.1.114.3113 (exclusive)
cpe:2.3:a:avira:internet_security:*:*:*:*:*:windows:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://blog.quarkslab.com/avira-deserialize-delete-and-esc…
https://blog.quarkslab.com/avira-deserialize-delete-and-escalate-the-proper-way…
https://support.avira.com/hc/en-us/articles/360010656158-Cu…
https://support.avira.com/hc/en-us/articles/360010656158-Current-Avira-versions
https://www.avira.com/en/internet-security
https://www.avira.com/en/internet-security
https://www.vulncheck.com/advisories/avira-internet-securit…
https://www.vulncheck.com/advisories/avira-internet-security-system-speedup-ins…