CVE-2020-12271: in the CISA KEV catalogue
Sophos SFOS SQL Injection Vulnerability. CISA added CVE-2020-12271 to the Known Exploited Vulnerabilities catalogue on 2021-11-03 with a default due date of 2022-05-03. Known ransomware campaign use: Known. Forensic triage flag: No.
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). (CISA description)
- Vendor / product
- Sophos SFOS
- CWE
- CWE-89
- CISA required action
- Apply updates per vendor instructions.
- EPSS
- 42%, percentile 98 (scored 2026-11-03)
EPSS puts about 42 in 100 odds (42%) on exploitation activity being observed in the next 30 days. Its score is higher than or equal to that of 98% of scored CVEs. This is a model estimate about exploitation anywhere, not about your environment.
Vendor and reference links (from CISA)
Your own deadline under CISA BOD 26-04 depends on exposure, automatability and technical impact: work it out with the BOD 26-04 calculator.
Frequently asked questions
Is CVE-2020-12271 in the CISA KEV catalogue?
Yes. CISA added CVE-2020-12271 (Sophos SFOS SQL Injection Vulnerability) to the Known Exploited Vulnerabilities catalogue on 2021-11-03. CISA's default due date for it is 2022-05-03.
Is CVE-2020-12271 used in ransomware attacks?
CISA marks known ransomware campaign use as Known for CVE-2020-12271.
What should I do about CVE-2020-12271?
CISA's required action: Apply updates per vendor instructions.
Sources
- CISA, Known Exploited Vulnerabilities Catalog (accessed 2026-11-03)
- FIRST, Exploit Prediction Scoring System (EPSS) (EPSS by FIRST; scores generated by Empirical Security)
- NVD record for CVE-2020-12271