CVE-2026-77169

Status: DeferredMedium (6.5)—

A vulnerability in the team folders (formerly group folders) app when used in combination with the workspace app allowed API/REST-only delegated administrators to bypass folder-level authorization controls. The workspace app enables organizations to delegate limited administrative privileges for team folder management via API/REST only, restricting access to folders for which the admin has advanced permissions.

CVSS

Version: 3.0
Vector: CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
Base score: 6.5

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.47%
Percentile among all scored CVEs: 38
Score date: 10/5/2026

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 movement75 %
Primary impactT1078.004 Cloud Accountsstealth · persistence · privilege escalation · initial access80 %
Secondary impactT1526 Cloud Service Discoverydiscovery65 %

Vulnerabilidad en API REST de Nextcloud que permite a administradores delegados (autenticados, PR:H) eludir controles de autorización a nivel de carpeta mediante servicio remoto. Acceso no autorizado a datos clasificados.

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 Active Directory Configuration Vulnerability Scanning User Training User Account Management Threat Intelligence Program

Affected technologies (2)

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

Nextcloud — Team Folders^AI Nextcloud — Workspace^AI

CWEs

CWE-284

References

https://hackerone.com/reports/3674940

Raw JSON (NVD)

Show

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