CVE-2020-12271
Sophos SFOS SQL Injection Vulnerability
What the flaw is
Sophos Firewall operating system (SFOS) firmware contains a SQL injection vulnerability when configured with either the administration (HTTPS) service or the User Portal is exposed on the WAN zone. Successful exploitation may cause remote code execution to exfiltrate 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).
Description as published by CISA. We have not independently reproduced it.
What CISA requires
Apply updates per vendor instructions.
This deadline is binding on US federal civilian agencies under BOD 22-01. It is not a legal deadline for anyone else, but it is a useful urgency signal — CISA sets it by how actively the flaw is being used, not by CVSS.
Public exploit code
8 public repositories referencing this CVE have been catalogued on GitHub. Treat this as a strong signal to prioritise patching, not as a verified working exploit — many such repositories are scanners, write-ups or forks rather than functional code.
Vendor advisories
Primary sources
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Other Sophos entries
See allSource: CISA KEV catalog · last verified August 6, 2026. Rebuilt automatically twice a day.