CVE-2026-93635 Zimbra Collaboration Suite LDAP Filter Injection via Unescaped computeDn() Template Substitution
Unauthenticated attackers can inject LDAP filters to bypass authentication or read sensitive directory data in Zimbra Collaboration Suite.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-93635?
CVE-2026-93635 is a medium-severity vulnerability in Zimbra Collaboration Suite, published on 14 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-90
Which versions are affected by CVE-2026-93635?
How do I fix CVE-2026-93635?
No fix has been published for CVE-2026-93635 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-93635 being exploited?
There is no known exploitation of CVE-2026-93635 in the wild and no public exploit code.
Sources
Also known as GHSA-fqwq-55mh-xc85.