Critical Zimbra security update fixes 9 vulnerabilities | HappeningNow.news

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Critical Zimbra security update fixes 9 vulnerabilities

Business email and collaboration suite Zimbra has received a major security update that fixes several critical issues that could allow attackers to execute malicious code on the server or in users’ browsers.

Source AI Summary Published July 22, 2026 Brief Under 1 min brief
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AI Summary

Zimbra Collaboration Suite released version 10.1.20, a security update that patches nine vulnerabilities across its commercial and open‑source editions. The update permanently fixes a critical SNMP monitoring flaw disclosed in June, which could let attackers inject commands when notifications are enabled. It also addresses four cross‑site scripting issues in the Classic Web Client, including exploits triggered by crafted attachment filenames or when users render attachments, preventing malicious scripts from running in browsers. The patches aim to protect the self‑hosted email platform used by businesses, governments and educational institutions.

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