ID :ISA-2026-083
High alertActiveCVSS 8.8/10IservicesCSIRT

Local file inclusion affecting Zimbra

Executive Summary

A critical vulnerability affecting Zimbra would allow an unauthenticated attacker to access arbitrary files on affected systems.

Published on February 26, 2026 at 01:00 AM by Iservices Csirt15 views

Description

Technical context and vulnerability details

Zimbra is an email solution and collaboration platform that allows you to manage emails, calendars and contacts. It is commonly used in professional environments and offers access via a web interface. This solution is affected by a critical vulnerability labeled CVE‑2025‑68645, resulting from insufficient validation of query parameters provided by a user in the RestFilter servlet. Exploitation of this vulnerability would allow an unauthenticated attacker to send specially crafted HTTP requests to the /h/rest endpoint, leading to unauthorized access to internal files on target systems. It is classified high with a severity score of 8.8 according to CVSS V3.1.

Potential Risks & Impact

Potential consequences upon exploitation

  • Compromise of system integrity;
  • Data privacy breach;

Affected systems

Products, components and targeted versions

  • Zimbra Collaboration Suite versions 10.0 prior to 10.0.18;
  • Zimbra Collaboration Suite versions 10.1 prior to 10.1.13;

Recommended Remediations & Actions

Immediate actions and recommended mitigations

  • Update Zimbra Collaboration to versions 10.0.18, 10.1.13 or later;

Advisory Specifications

ISA-2026-083
CVSS scoreHIGH
8.8/ 10.0
0.0 (Low)5.0 (Med)10.0 (Crit)
PriorityHigh
StatusActive
Typesecurite
Published onFebruary 26, 2026 at 01:00 AM
OrigineIservicesCSIRT
Audience15 views

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