CVE-2025-66208

CVE

Threat entity extracted from intelligence sources

Frequency

occurrences

First Seen

October 14, 2026

Last Seen

October 14, 2026

API

Exploited in Wild

—

Ransomware Use

—

Public Exploits

—

Attack Vector

—

Vulnerability Overview

Exploitation Activity

Exploitation Intelligence

Critical Flaw in Collabora's CODE Server Backdoors Nextcloud Servers78.0

A critical vulnerability (CVE-2026-110447) in the Collabora Online - Built-in CODE Server app allows attackers to execute commands on Nextcloud servers via unauthenticated requests. The flaw was exploited to plant web shells, with the first attack reported on September 10, 2026. Collabora issued a f...