Improper access control in Zimbra Collaboration - CVE-2026-10631
Published: August 21, 2026
Vulnerability identifier: #VU144525
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-10631
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to bypass access controls.
The vulnerability exists due to improper access control in the EWS extension when handling access-controlled operations. A remote user can perform crafted operations to bypass access controls.
Affected software
Zimbra Collaboration
How to mitigate CVE-2026-10631
Install security update from vendor's website.
Zimbra Collaboration - update to 10.1.20