Cve20207796 Zimbra Collaboration Suite ((free)) Full -

: By hitting the exposed JSP endpoint, an attacker specifies a destination IP address or hostname that is normally hidden behind a strict corporate firewall. The Zimbra server accepts the request, resolves the destination locally, fetches the internal asset, and returns the response to the attacker. Severe Exploitation Impacts

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In the world of cybersecurity, vulnerabilities are often discussed among a mix of panic and confusion. One such instance involves the keyword "CVE-2020-27996 Zimbra Collaboration Suite Full." A web search for this term quickly leads to an unexpected discovery: the official MITRE CVE entry for CVE-2020-27996 actually describes a completely unrelated software application called (a .NET e-commerce platform), not the Zimbra Collaboration Suite (ZCS). This can be confusing for system administrators and security researchers trying to protect their Zimbra email servers.

This article provides a comprehensive overview of , a vulnerability affecting the Zimbra Collaboration Suite (ZCS) , including its technical details, impact, and remediation steps. cve20207796 zimbra collaboration suite full

Given the severity and active exploitation, immediate action is critical. The following steps provide a roadmap for securing your Zimbra installation.

As of early 2026, this vulnerability has seen a major resurgence in active exploitation:

The ability for an attacker to leverage this for full remote code execution, data theft, and lateral movement makes it a top priority for any organization running a Zimbra mail server. The active exploitation observed by CISA and security firms confirms that attackers are well aware of the opportunity. : By hitting the exposed JSP endpoint, an

is a critical security flaw in the Zimbra Collaboration Suite (ZCS) that allows unauthenticated remote attackers to trigger Server-Side Request Forgery (SSRF)

Requests could be crafted to extract sensitive information or metadata from internal endpoints .

In the ever-evolving landscape of cybersecurity, some vulnerabilities stand out due to their potential for widespread damage and critical impact. is exactly that: a severe Server-Side Request Forgery (SSRF) vulnerability in the Zimbra Collaboration Suite (ZCS) , one of the world's most popular email and collaboration platforms. Given the severity and active exploitation, immediate action

All versions of Zimbra Collaboration Suite (ZCS) prior to 8.8.15 Patch 7 .

[ Unauthenticated Attacker ] │ │ 1. Sends Malicious HTTP Request with Internal Target Payload ▼ [ Vulnerable Zimbra Server ] (Perimeter/DMZ) │ │ 2. Processes Request Without Input Validation ▼ [ Internal Network Resource ] (Firewalled Database, Metadata APIs, Cloud Infrastructure) Severe Impact & Exploit Vectors

Security Vulnerability Report: CVE-2020-7796 Target System: Synacor Zimbra Collaboration Suite (ZCS) Vulnerability Type: Server-Side Request Forgery (SSRF) Date of Vulnerability: Originally reported in late 2020; recently noted as actively exploited as of February 2026 1. Executive Summary CVE-2020-7796