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Vulnerabilities

Vulnerability · CVE-2022-1040

Sophos Firewall Authentication Bypass Vulnerability

Published Mar 21, 2022 · catalog updated Jun 16, 2026 · Sophos Firewall

Patch now

CVE-2022-1040 is in the CISA known-exploited catalog, due Apr 21, 2022. Confirm Sophos Firewall against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
Severity
Critical9.8
Known exploitation
CISA KEV and VulnCheck KEV
EPSS
99.80%
Remediation
Remediation guidance
Affected products
cpe sophos/sfos · vendor Sophos Firewall

An authentication bypass vulnerability in User Portal and Webadmin of Sophos Firewall allows for remote code execution. VulnCheck canary evidence. Initial-access exploit intelligence.

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/sfosversion unspecified
  • vendor Sophos Firewallversion unspecified

How to fix CVE-2022-1040

What to do

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

Should you patch?

CVE-2022-1040 is in the CISA known-exploited catalog, due Apr 21, 2022. Confirm Sophos Firewall against the vendor advisory and apply that fix. The CVSS score does not change the priority.

Which versions are affected?

Affected version ranges are not on this record. Apply updates per vendor instructions.

What should an analyst verify?

CWE-158. EPSS 99.80%. The CISA KEV listing is the exploitation evidence. A public exploit reference is linked in Sources. That is not the same as confirmed exploitation. 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. Mar 25, 2022 · Catalog

    Detected

    An authentication bypass vulnerability in the User Portal and Webadmin allows a remote attacker to execute code in Sophos Firewall version v18.5 MR3 and older.

  2. Mar 31, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Apr 21, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jun 16, 2026 · Catalog

    Updated

    An authentication bypass vulnerability in the User Portal and Webadmin allows a remote attacker to execute code in Sophos Firewall version v18.5 MR3 and older.

Sources

  • CISA KEVConfirmed exploitationCVE-2022-1040

    An authentication bypass vulnerability in User Portal and Webadmin of Sophos Firewall allows for remote code execution.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2022-1040

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2022-1040

    30-day exploitation probability 99.8%

    first.org
  • Exploit DatabasePublic exploit reference51006

    Public archive entry. The exploit body is not stored here.

    exploit-db.com
  • NIST NVDVulnerability recordCVE-2022-1040

    An authentication bypass vulnerability in the User Portal and Webadmin allows a remote attacker to execute code in Sophos Firewall version v18.5 MR3 and older.

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/168046/Sophos-XG115w-Firewall-17.0.10-MR-10-Authentication-Bypass.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com
  • VulnCheck KEVConfirmed exploitationCVE-2022-1040

    An authentication bypass vulnerability in User Portal and Webadmin of Sophos Firewall allows for remote code execution.

    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.