CVE-2022-1040
Sophos Firewall Authentication Bypass Vulnerability
- Critical 9.8
- Exploited: added to CISA KEV 31 Mar 2022
Description
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.
Key facts
- Published
- 25 Mar 2022
- Last changed
- 21 Oct 2025
- Assigned by
- Sophos
- KEV added
- 31 Mar 2022
- KEV fix due
- 21 Apr 2022
- EPSS
- 99.796% likely to be exploited in the next 30 days, higher than 99.958% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: total
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 9.8CVSS 3.1, Criticalfrom the CNA (Sophos)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Sophos | Sophos Firewall |
|
Timeline
- 25 Mar 2022 Published
- 31 Mar 2022 CVE-2022-1040 added to CISA KEV
- 31 Mar 2022 Added to the CISA KEV catalogue