CVE-2016-3413 in Zimbra Collaboration
Summary
by MITRE
Unspecified vulnerability in Zimbra Collaboration before 8.7.0 allows remote attackers to affect integrity via unknown vectors, aka bug 103996.
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Analysis
by VulDB Data Team • 05/13/2026
The vulnerability identified as CVE-2016-3413 affects Zimbra Collaboration software versions prior to 8.7.0, representing a critical security flaw that compromises data integrity within the email platform. This unspecified vulnerability falls under the category of integrity violations, meaning that remote attackers can potentially manipulate or corrupt data without direct authentication or authorization. The issue was tracked internally as bug 103996, indicating it was recognized and documented by Zimbra's development team before its public disclosure. The unspecified nature of the vulnerability vectors suggests that the exact technical mechanism remains partially obscured, though the implications for data integrity are clear.
Zimbra Collaboration Suite serves as a comprehensive enterprise email and collaboration platform, handling sensitive business communications, calendar data, contacts, and file sharing capabilities. The vulnerability affects the software's ability to maintain data integrity, which could enable attackers to modify email content, alter calendar entries, corrupt contact information, or manipulate other collaborative data elements. This type of integrity compromise represents a significant risk to organizations relying on Zimbra for mission-critical communications, as it could lead to misinformation, operational disruption, or potential data loss. The vulnerability's remote exploitability means that attackers can target systems without requiring physical access or local network presence, amplifying the attack surface and potential impact.
The operational impact of this vulnerability extends beyond simple data corruption to encompass broader security implications for enterprise environments. Organizations using affected Zimbra versions face risks of unauthorized data modification, which could affect business operations, compliance requirements, and regulatory adherence. The integrity compromise could facilitate more sophisticated attacks where attackers manipulate communication records to conduct social engineering, fraud, or espionage activities. From a cybersecurity perspective, this vulnerability aligns with common attack patterns described in the MITRE ATT&CK framework under the data integrity sub-techniques, where adversaries seek to modify data to achieve their objectives without necessarily gaining complete system control.
Security practitioners should consider this vulnerability in the context of CWE-284, which addresses improper access control, and CWE-311, which covers missing encryption of sensitive data. The lack of specific vector information makes defensive measures challenging, as traditional perimeter-based security approaches may not adequately protect against this class of vulnerability. Organizations should prioritize immediate patching to version 8.7.0 or later, as this represents the first release containing the necessary security fixes. Additionally, implementing network segmentation, monitoring for unusual data modifications, and maintaining comprehensive backup procedures can help mitigate the operational risks associated with this integrity compromise. The vulnerability underscores the importance of regular security updates and continuous monitoring of enterprise collaboration platforms to prevent unauthorized modifications to critical business data.