CVE-2026-50054CWE-269privilege-escalation

CVE-2026-50054

High · published October 8, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
6.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00171 · 6.2th percentile
Weakness
CWE-269 · Improper Privilege Management
Published
2026-10-08T21:17Z
References (1)
https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories · [email protected]
EPSS history
Timeline
  • 10 OCT 03:29Z
    EPSS moved — → 0%
    epss
  • 08 OCT 16:25Z
    Zimbra Collaboration Suite GrantRightsRequest SOAP Handler Allows Self-Granting of Undocumented loginAs Mailbox Delegation Right
    cvelistv5
  • 08 OCT 16:25Z
    Zimbra Collaboration Suite GrantRightsRequest SOAP Handler Allows Self-Granting of Undocumented loginAs Mailbox Delegation Right
    cvelistv5