Zimbra Patches Critical Code Execution Vulnerability
The flaw results in malicious code embedded in crafted emails being executed when the emails are opened. The post Zimbra Patches Critical Code Execution Vulnerability appeared first on SecurityWeek .
AI Analysis
Technical Summary
Zimbra Collaboration Suite (ZCS) Classic Web Client contained a critical stored XSS vulnerability that permitted execution of malicious code embedded in crafted emails upon opening. This zero-click code execution flaw could lead to unauthorized access to mailbox contents, session information, and account configurations. The vulnerability was reported by Google's Threat Analysis Group and addressed in ZCS version 10.1.19. Customers using versions 10.0.x, 9.0.x, or 8.8.15 should also update SNMP mitigation and reapply it after upgrading. No CVE identifier has been assigned yet.
Potential Impact
Exploitation of this vulnerability could allow attackers to execute arbitrary code in the context of the user's session without user interaction beyond opening an email. This may result in unauthorized access to sensitive mailbox data, session tokens, and account settings, potentially compromising user confidentiality and integrity.
Mitigation Recommendations
An official patch is available in Zimbra Collaboration Suite version 10.1.19, released on July 7, 2026. All customers using the Classic Web Client should upgrade to this version immediately. Additionally, customers upgrading from versions 10.0.x, 9.0.x, or 8.8.15 must update and reapply the SNMP mitigation after the upgrade. No other mitigation steps are indicated by the vendor.
Zimbra Patches Critical Code Execution Vulnerability
Description
The flaw results in malicious code embedded in crafted emails being executed when the emails are opened. The post Zimbra Patches Critical Code Execution Vulnerability appeared first on SecurityWeek .
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Zimbra Collaboration Suite (ZCS) Classic Web Client contained a critical stored XSS vulnerability that permitted execution of malicious code embedded in crafted emails upon opening. This zero-click code execution flaw could lead to unauthorized access to mailbox contents, session information, and account configurations. The vulnerability was reported by Google's Threat Analysis Group and addressed in ZCS version 10.1.19. Customers using versions 10.0.x, 9.0.x, or 8.8.15 should also update SNMP mitigation and reapply it after upgrading. No CVE identifier has been assigned yet.
Potential Impact
Exploitation of this vulnerability could allow attackers to execute arbitrary code in the context of the user's session without user interaction beyond opening an email. This may result in unauthorized access to sensitive mailbox data, session tokens, and account settings, potentially compromising user confidentiality and integrity.
Mitigation Recommendations
An official patch is available in Zimbra Collaboration Suite version 10.1.19, released on July 7, 2026. All customers using the Classic Web Client should upgrade to this version immediately. Additionally, customers upgrading from versions 10.0.x, 9.0.x, or 8.8.15 must update and reapply the SNMP mitigation after the upgrade. No other mitigation steps are indicated by the vendor.
Technical Details
- Article Source
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Threat ID: 6a54bb7068715ace43a4e448
Added to database: 07/13/2026, 10:18:24 UTC
Last enriched: 07/13/2026, 10:18:35 UTC
Last updated: 07/13/2026, 11:53:03 UTC
Views: 23
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