CVE-2026-33372
5.4 · MEDIUMAn issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1.
Overview
CVE-2026-33372 is a medium-severity vulnerability affecting synacor zimbra_collaboration_suite. It was published on March 20, 2026 and has a CVSS 3.1 base score of 5.4 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
Technical description
An issue was discovered in Zimbra Collaboration (ZCS) 10.0 and 10.1. A cross-site request forgery (CSRF) vulnerability exists in Zimbra Webmail due to improper validation of CSRF tokens. The application accepts CSRF tokens supplied within the request body instead of requiring them through the expected request header. An attacker can exploit this issue by tricking an authenticated user into submitting a crafted request. This may allow unauthorized actions to be performed on behalf of the victim.
Remediation
Check the references section for vendor advisories and patches from synacor. Update zimbra_collaboration_suite to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| synacor | zimbra_collaboration_suite | >= 10.0.0, < 10.1.16 | Affected |
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Frequently asked questions
What is CVE-2026-33372?
CVE-2026-33372 is a medium-severity vulnerability affecting synacor zimbra_collaboration_suite. It was published on March 20, 2026 and has a CVSS 3.1 base score of 5.4 (MEDIUM).
How severe is CVE-2026-33372?
This vulnerability has a CVSS 3.1 base score of 5.4, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2026-33372?
Check the references section for vendor advisories and patches from synacor. Update zimbra_collaboration_suite to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2026-33372?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-33372 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
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