CVE-2026-27748

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 an improper link resolution vulnerability in the Software Updater component. During the update process, a privileged service running as SYSTEM deletes a file under C:\\ProgramData without validating whether the path resolves through a symbolic link or reparse point. A local attacker can create a malicious link to redirect the delete operation to an arbitrary file, resulting in deletion of attacker-chosen files with SYSTEM privileges. This may lead to local privilege escalation, denial of service, or system integrity compromise depending on the targeted file and operating system configuration.

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
0,0002
Percentile
0,0th
Updated

EPSS Score Trend (Last 11 Days)

59

Improper Link Resolution Before File Access ('Link Following')

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Integrity Access Control Other
Potential Impacts:
Read Files Or Directories Modify Files Or Directories Bypass Protection Mechanism Execute Unauthorized Code Or Commands
Applicable Platforms
Operating Systems: Windows, Unix
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-arbitrary-file-del…