Overview
The CVE-2025-53395 vulnerability represents a serious flaw in the Paramount Macrium Reflect software. This vulnerability allows local attackers to execute arbitrary code with administrative privileges, potentially leading to system compromise or data leakage. Given the severity and potential impact of this vulnerability, it is essential for users of the affected software to apply necessary patches and mitigation methods immediately.
Vulnerability Summary
CVE ID: CVE-2025-53395
Severity: High (7.7 CVSS Score)
Attack Vector: Local
Privileges Required: Administrative
User Interaction: Required
Impact: System compromise or data leakage
Affected Products
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Product | Affected Versions
Paramount Macrium Reflect | Versions up to 2025-06-26
How the Exploit Works
The exploit works by having the attacker create a crafted .mrimgx backup file and a malicious VSSSvr.dll located in the same directory. When a user with administrative privileges mounts a backup by opening the .mrimgx file, Reflect loads the attacker’s VSSSvr.dll after the mount completes. This occurs due to untrusted DLL search path behavior in ReflectMonitor.exe, allowing the attacker to execute arbitrary code with administrative privileges.
Conceptual Example Code
While specific exploit code is not available, a conceptual understanding of the exploit process can be represented as follows:
// Attacker creates a malicious .mrimgx file and a crafted VSSSvr.dll
create_crafted_backup_and_dll(".mrimgx", "VSSSvr.dll")
// User with administrative privileges opens the .mrimgx file
open_backup_file(".mrimgx")
// ReflectMonitor.exe loads the malicious VSSSvr.dll
load_dll("VSSSvr.dll")
// Attacker's code is executed with administrative privileges
execute_code_with_privileges("VSSSvr.dll")Given the local nature of the attack, it would require some form of interaction or pre-existing access on the part of the attacker. This could be achieved through social engineering, previous compromise, or other attack vectors.
