Is CVE-2026-93635 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-93635?

CVE-2026-93635 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-93635

Description

LDAP filter injection in Zimbra Collaboration Suite 10.1.0 through 10.1.21 allows unauthenticated attackers to alter external LDAP search filters. On domains using search-filter authentication and lazy provisioning, this creates a password oracle for external directory users. Authenticated S/MIME lookups can also return certificates and identity data for unintended directory entries.