CVE-2020-12271: Sophos SFOS SQL Injection Vulnerability

Critical severity, CVSS 9.8. Actively exploited: in CISA KEV since 2021-11-03. EPSS: 42.4% chance of exploitation in the next 30 days.

A SQL injection issue was found in SFOS 17.0, 17.1, 17.5, and 18.0 before 2020-04-25 on Sophos XG Firewall devices, as exploited in the wild in April 2020. This affected devices configured with either the administration (HTTPS) service or the User Portal exposed on the WAN zone. A successful attack may have caused remote code execution that exfiltrated usernames and hashed passwords for the local device admin(s), portal admins, and user accounts used for remote access (but not external Active Directory or LDAP passwords)

Affected products

• Sophos SFOS: version 17.0 only; version 17.1 only; version 17.5 only; version 18.0 only

Published 2020-04-27. Last modified 2026-06-17.