Link Following Local Privilege Escalation Vulnerability in AVG TuneUp Version 23.4

published 2025-05-09 18 mo ago modified 2026-06-17 4 mo ago also EUVD-2024-54469

cvss: 7.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits: 0; none known

Link Following Local Privilege Escalation Vulnerability in TuneUp Service in AVG TuneUp Version 23.4 (build 15592) on Windows 10 allows local attackers to escalate privileges and execute arbitrary code in the context of SYSTEM via creating a symbolic link and leveraging a TOCTTOU (time-of-check to time-of-use) attack.

Patch / fix

fixed in 1

AVG TuneUp 24.1 31.7.2024

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 18 mo ago (2025-05-09)

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.8	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

AVG TuneUp

Classification

Weakness

CWE-59 Improper Link Resolution Before File Access
CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition

References

gendigital.com /us/en/contact-us/security-advisories/

Sources

CVE List CVE-2024-13960
NVD CVE-2024-13960

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary