CVE-2026-50054

EUVD-2026-95097
An authorization flaw in Zimbra Collaboration Suite’s GrantRightsRequest allows an attacker with access to an authenticated account to grant another local account the loginAs right, creating persistent mailbox access and mail-sending authority that survives password changes and session expiry.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
rapid7CNA
7.1 HIGH
NETWORK
LOW
LOW
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Early Detection
Affected products identified ahead of NVD analysis through intelligence sources.
VendorProductVersionSource
zimbracollaboration
𝑥
< 10.1.20
CNA
Common Weakness Enumeration
References
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories