Paramount Macrium Reflect up to 2025-06-26 Backup File uncontrolled search path

Summaryinfo

A vulnerability classified as critical was found in Paramount Macrium Reflect up to 2025-06-26. The impacted element is an unknown function of the component Backup File Handler. Such manipulation leads to Local Privilege Escalation. This vulnerability is referenced as CVE-2025-53394. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Paramount Macrium Reflect up to 2025-06-26. Affected by this issue is an unknown function of the component Backup File Handler. The manipulation with an unknown input leads to a local privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-427. The product uses a fixed or controlled search path to find resources, but one or more locations in that path can be under the control of unintended actors. Impacted is confidentiality, integrity, and availability. CVE summarizes:

Paramount Macrium Reflect through 2025-06-26 allows attackers to execute arbitrary code with administrator privileges via a crafted .mrimgx or .mrbax backup file and a renamed executable placed in the same directory. When a user with administrative privileges opens the crafted backup file and proceeds to mount it, Reflect launches the renamed executable (e.g., explorer.exe), which is under attacker control. This occurs because of insufficient validation of companion files referenced during backup mounting.

This vulnerability is handled as CVE-2025-53394 since 06/29/2025. The exploitation is known to be easy. Local access is required to approach this attack. The exploitation requires an enhanced level of successful authentication. Successful exploitation requires user interaction by the victim. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 08/06/2025). This vulnerability is assigned to T1574 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Paramount

Name

• Macrium Reflect

Version

• 2025-06-26

CPE 2.3info

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CPE 2.2info

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