CVE-2026-57895 in Pupsman
Summary
by MITRE • 07/08/2026
Incorrect default permissions issue exists in Pupsman versions prior to 3.9.0. An attacker can place a malicious executable in the installation folder, which results in arbitrary code execution with SYSTEM privilege
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Analysis
by VulDB Data Team • 07/08/2026
The vulnerability identified in Pupsman versions prior to 3.9.0 represents a critical privilege escalation flaw stemming from improper default permissions within the software installation directory. This issue falls under the CWE-276 category of insecure default permissions, where the application fails to properly secure its installation folder structure. The vulnerability arises because the installer and runtime environment do not enforce restrictive file system permissions that would prevent unauthorized modification of critical components. Attackers can exploit this weakness by simply placing a malicious executable file in the designated installation directory, leveraging the software's inherent trust in its own installation folder. This design flaw creates an ideal attack vector for privilege escalation since the application operates with elevated privileges during execution, and any code placed within its installation directory will be executed with the same elevated rights as the parent process.
The technical implementation of this vulnerability demonstrates a fundamental failure in access control mechanisms within the software lifecycle. When Pupsman executes, it typically runs with SYSTEM-level privileges to ensure proper functionality across different user contexts and system configurations. The default installation folder permissions do not restrict write access to this critical directory, allowing any local user to modify or replace executable files within the application's installation path. This misconfiguration means that an attacker who gains access to a low-privilege account can manipulate the installation directory to inject malicious code that will execute with SYSTEM privileges upon the next application launch or system reboot. The flaw essentially creates a persistent backdoor mechanism where unauthorized code execution occurs without requiring additional exploitation techniques beyond simple file placement.
The operational impact of this vulnerability extends far beyond simple privilege escalation, creating significant risks for enterprise environments and systems where Pupsman is deployed. Organizations using affected versions face potential complete system compromise since the malicious executable will run with full administrative privileges, enabling attackers to modify system files, install persistence mechanisms, or exfiltrate sensitive data. The vulnerability's exploitation requires minimal technical skill and can be automated through simple file manipulation scripts, making it particularly dangerous in environments where multiple users have access to systems running vulnerable software. Additionally, the persistence aspect of this flaw means that even if detection efforts identify and remove initial malicious payloads, subsequent application execution will continue to trigger code execution with elevated privileges, effectively maintaining attacker control over the compromised system.
Mitigation strategies for this vulnerability require immediate implementation of proper file system permissions and access controls within the affected installation directories. Organizations should enforce restrictive permissions on Pupsman installation folders, ensuring that only authorized administrative users can modify critical files within these paths. The recommended approach includes implementing mandatory access controls through Windows file system permissions or equivalent mechanisms in other operating systems to prevent unauthorized write access to installation directories. Additionally, applying the vendor-provided patch version 3.9.0 or later resolves the underlying permission configuration issues that enable this exploitation vector. Security teams should also implement monitoring procedures to detect unusual file modifications within application installation directories and establish regular audits of system permissions to ensure that default configurations have not been inadvertently altered by system administrators or malicious actors. This vulnerability aligns with ATT&CK technique T1068 which covers local privilege escalation through insecure software configuration, emphasizing the need for proper application security hardening practices.