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Vulnerabilities

Vulnerability · CVE-2020-12271

Sophos SFOS SQL Injection Vulnerability

Published Apr 22, 2020 · catalog updated Jun 16, 2026 · Sophos SFOS

Patch now

CVE-2020-12271 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Sophos SFOS against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
42.43%
Remediation
Remediation guidance
Affected products
cpe sophos/sfos · vendor Sophos SFOS

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)

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe sophos/sfos17.0
  • cpe sophos/sfos17.1
  • cpe sophos/sfos17.5
  • cpe sophos/sfos18.0
  • vendor Sophos SFOSversion unspecified

How to fix CVE-2020-12271

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

CVE-2020-12271 is in the CISA known-exploited catalog, due May 3, 2022. Confirm Sophos SFOS against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Compare what you have installed with 17.0, 17.1, 17.5, 18.0. Apply updates per vendor instructions.

What should an analyst verify?

CWE-89: SQL Injection. EPSS 42.43%. The CISA KEV listing is the exploitation evidence. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 26, 2020 · Catalog

    Detected

    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

  2. Nov 3, 2021 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. May 3, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    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

Sources

  • CISA KEVConfirmed exploitationCVE-2020-12271

    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 exter

    cisa.gov
  • CVE.orgVulnerability recordCVE-2020-12271

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2020-12271

    30-day exploitation probability 42.4%

    first.org
  • NIST NVDVulnerability recordCVE-2020-12271

    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.

    nvd.nist.gov
  • VulnCheck KEVConfirmed exploitationCVE-2020-12271

    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 an

    vulncheck.com

References

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.