(0Day) Glarysoft Glary Utilities Link Following Local Privilege Escalation Vulnerability
Vulnerability Details
This vulnerability allows local attackers to escalate privileges on affected installations of Glarysoft Glary Utilities. 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 Disk Clean functionality. By creating a junction, an attacker can abuse the service to delete arbitrary files. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of SYSTEM.
Additional Details
05/29/25 - ZDI submitted the report to the vendor
06/25/25 - ZDI followed up asking the vendor to confirm receipt
09/12/25 - ZDI asked for updates
12/04/25 - ZDI notified the vendor of the intention to publish the case as a 0-day advisory
-- Mitigation: Given the nature of the vulnerability, the only salient mitigation strategy is to restrict interaction with the product
Disclosure Timeline
- 2025-05-29 - Vulnerability reported to vendor
- 2026-07-08 - Coordinated public release of advisory
- 2026-07-08 - Advisory Updated
Credit
Sharkkcode and Zeze with TeamT5
