Advisory Details

July 29th, 2025

AVG TuneUp for PC TuneupSvc Link Following Local Privilege Escalation Vulnerability

ZDI-25-697
ZDI-CAN-25498

CVE ID CVE-2024-13959
CVSS SCORE 7.8, AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AFFECTED VENDORS AVG
AFFECTED PRODUCTS TuneUp for PC
VULNERABILITY DETAILS

This vulnerability allows local attackers to escalate privileges on affected installations of AVG TuneUp for PC. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the AVG TuneUp Service. By creating a symbolic link, an attacker can abuse the service to delete a directory. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.

ADDITIONAL DETAILS

Fixed in AVG TuneUp 24.3.17165.10564


DISCLOSURE TIMELINE
  • 2024-10-03 - Vulnerability reported to vendor
  • 2025-07-29 - Coordinated public release of advisory
  • 2025-07-29 - Advisory Updated
CREDIT Vladislav Berghici of Trend Micro Research
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