Critical (9.8) in zeroshell zeroshell. EPSS 90% chance of exploitation in the next 30 days.
Zeroshell 3.9.0 is prone to a remote command execution vulnerability. Specifically, this issue occurs because the web application mishandles a few HTTP parameters. An unauthenticated attacker can exploit this issue by injecting OS commands inside the vulnerable parameters.
Severity
CVSS 3.0
9.8 critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
90% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-31)