CVE-2026-50054

Status: Awaiting AnalysisHigh (7.1)—

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.

CVSS

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Base score: 7.1

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.17%
Percentile among all scored CVEs: 6
Score date: 10/13/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1210 Exploitation of Remote Serviceslateral movement85 %
Primary impactT1098.002 Additional Email Delegate Permissionspersistence · privilege escalation90 %
Secondary impactT1078.001 Default Accountsstealth · persistence · privilege escalation · initial access85 %

Vector AV:N/PR:L/AC:L indica explotación remota con privilegios (T1210). El atacante obtiene derechos loginAs persistentes (T1098.002: cuenta comprometida con acceso delegado) y puede acceder a buzones sin cambios de contraseña (T1078.001: abuso de cuentas válidas).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Privileged Account Management Multi-factor Authentication Disable or Remove Feature or Program Vulnerability Scanning Threat Intelligence Program Password Policies

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Zimbra — Collaboration Suite^AI

CWEs

CWE-269

References

https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories

Raw JSON (NVD)

Show

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