CVE-2024-13961 Avast Cleanup Premium TuneupSvc Link Following Local Privilege Escalation Vulnerability
Local attackers can escalate privileges to SYSTEM via a TOCTTOU race condition in TuneupSvc using symbolic links.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2024-13961?
CVE-2024-13961 is a high-severity vulnerability in Avast CleanUp Premium, published on 9 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Link Following Local Privilege Escalation Vulnerability in TuneupSvc in Avast Cleanup Premium Version 24.2.16593.17810 on Windows 10 Pro x64 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.
Which versions are affected by CVE-2024-13961?
How do I fix CVE-2024-13961?
No fix has been published for CVE-2024-13961 yet. Limit exposure of the affected software until one is available.
Is CVE-2024-13961 being exploited?
There is no known exploitation of CVE-2024-13961 in the wild and no public exploit code.
Sources
Also known as GHSA-wm67-4pmx-xf72.