CVE-2026-27748
Plain English Summary
AI-powered analysis for quick understanding
This vulnerability allows an attacker to delete any file on the system with high-level permissions by tricking a software updater into following a malicious link. The attacker needs local access to the machine to create this link, which can lead to serious issues like crashing the system or compromising its integrity.
Technical Description
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.
CVSS Vector Analysis
Vector String
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XExploit Resources
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Official References
Quick Information
Published
Mar 5, 2026
about 1 month ago
Last Modified
Mar 5, 2026
about 1 month ago