LDAP Injection in Zimbra Collaboration Suite
CVE-2026-93635
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.
Published .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1 (third-party-advisory)
Frequently asked questions
- What is CVE-2026-93635?
- CVE-2026-93635 is a medium-severity vulnerability in Zimbra Collaboration Suite, classified under LDAP Injection. CVSS score: 5.3/10. Published 2026-10-14.
- How severe is CVE-2026-93635?
- Medium severity. CVSS v3 base score is 5.3 out of 10.