Gen Digital CCleaner Vulnerability Allows Local Privilege Escalation
A local privilege escalation vulnerability in Gen Digital CCleaner, tracked as CVE-2026-12410, allows attackers with initial low-privilege code execution to gain higher system privileges.
A local privilege escalation vulnerability has been discovered in Gen Digital CCleaner, a popular system optimization and cleaning utility. The flaw, assigned the identifier CVE-2026-12410, allows attackers who have already gained the ability to execute low-privileged code on a target system to elevate their privileges to a higher level.
The Zero Day Initiative (ZDI), which disclosed the vulnerability, has assigned it a CVSS score of 7.8. This score indicates a high severity, underscoring the potential impact of this flaw. Attackers would need initial access to the system, but once achieved, they could leverage this vulnerability to gain administrative or SYSTEM-level privileges, enabling them to perform more malicious actions.
Exploitation of this vulnerability requires an attacker to first compromise the target system with low-privileged code execution. This could be achieved through various means, such as tricking a user into running a malicious file, exploiting another pre-existing vulnerability, or gaining access through social engineering tactics. Once this initial foothold is established, the attacker can then proceed to exploit CVE-2026-12410.
The exact technical details of how the vulnerability is exploited are not fully disclosed in the initial advisory, but it is described as a "Link Following Local Privilege Escalation Vulnerability." This suggests that the flaw might involve how CCleaner handles or follows symbolic links or other file system objects, potentially leading to unintended file operations or code execution in a privileged context.
While the advisory does not specify which versions of CCleaner are affected, users are strongly encouraged to ensure they are running the latest available version of the software. Gen Digital, the parent company of CCleaner, is expected to release security patches to address this vulnerability. Users should monitor official Gen Digital channels for updates and apply them as soon as they become available.
This vulnerability highlights the ongoing risk associated with even seemingly benign system utility software. Applications that operate with elevated privileges or interact deeply with the operating system can become attractive targets for attackers seeking to escalate their access. Users should exercise caution when installing and using such software, and always keep it updated to the latest version.
The disclosure by the Zero Day Initiative follows their standard practice of responsible disclosure, working with the vendor to ensure a patch is available or a reasonable timeframe has passed before publicizing the details of the vulnerability. This allows users and organizations time to prepare for and apply necessary security updates, mitigating the risk of widespread exploitation.