CVE-2025-50325 in BandiZip
Summary
by MITRE • 07/23/2026
BandiZip v.7.37 is affected by a Authentication Bypass Vulnerability. This vulnerability allows remote attackers to bypass the Mark-of-the-Web protection mechanism on affected installations of BandiZip
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Analysis
by VulDB Data Team • 07/23/2026
The vulnerability in BandiZip version 7.37 represents a critical authentication bypass flaw that undermines the software's security mechanisms designed to protect users from potentially malicious content. This issue specifically targets the Mark-of-the-Web protection system, which is a Windows security feature that marks files downloaded from the internet with a specific attribute to alert users and prevent automatic execution of potentially harmful code. The vulnerability allows remote attackers to circumvent these protective measures through crafted archive files or malicious content delivery methods.
Technical exploitation of this authentication bypass occurs when BandiZip fails to properly validate the origin and integrity of compressed archives, particularly those that have been downloaded from untrusted sources or modified by attackers. The flaw enables adversaries to present specially crafted archive files that appear to originate from trusted sources, thereby tricking the application into executing code without proper security checks that would normally be enforced when dealing with internet-downloaded content. This vulnerability operates at the application layer and leverages weaknesses in how BandiZip handles file validation and trust verification processes.
The operational impact of this vulnerability extends beyond simple privilege escalation as it enables attackers to execute arbitrary code on affected systems through seemingly legitimate archive operations. When users open compromised archives, the bypassed security mechanisms allow malicious payloads embedded within compressed files to execute automatically without user warnings or consent. This creates a significant risk for enterprise environments where users may regularly download and extract files from various sources, potentially leading to full system compromise, data exfiltration, or lateral movement within networks.
Security mitigations for this vulnerability should include immediate patching of BandiZip installations to the latest version that addresses the authentication bypass issue. System administrators should implement strict file validation policies and consider deploying application control solutions such as Microsoft AppLocker or similar technologies to restrict execution of untrusted archive files. Network-level protections including web proxies with content filtering and sandboxed execution environments can provide additional defense-in-depth measures. Organizations should also conduct security awareness training to educate users about the risks of opening archives from untrusted sources and implement mandatory verification processes for critical system files.
This vulnerability aligns with CWE-287 which addresses improper authentication issues, and relates to ATT&CK technique T1059.007 for command and script interpreter execution through archive manipulation. The flaw represents a significant weakening of the software supply chain security model and demonstrates the importance of proper input validation and trust verification mechanisms in archive processing applications. Organizations should monitor vendor advisories closely and implement comprehensive vulnerability management processes to address similar issues that may affect other compression utilities and file extraction tools within their environments.