Critical 9.8Known exploited (CISA KEV)Published Mar 25, 2022

CVE-2022-1040An 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.

Updated under an hour ago (2026-10-19 08:50 UTC)

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It affects Sophos Firewall and 1 other product. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Mar 31, 2022; federal agencies had to remediate by Apr 21, 2022. Treat that date as your deadline.

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Every CVE for Sophos Firewall

Exploited in the last 30 days

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.

CVSS: 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Added to CISA KEV Mar 31, 2022; federal remediation due Apr 21, 2022Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 99.80% (percentile 100)
Assigned by: Sophos
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Sophos Sophos Firewall sophos:firewall (from the name)	from unspecified through 18.5 MR3	CNA record
sophos sfos sophos:sfos	through 18.5.3	NVD

References

https://www.sophos.com/en-us/security-advisories/sophos-sa-20220325-sfos-rcex-refsource-confirm, mitigation, vendor-advisory
http://packetstormsecurity.com/files/168046/Sophos-XG115w-Firewall-17.0.10-MR-10-Authentication-Bypass.htmlx-refsource-misc, exploit, third-party-advisory, vdb-entry
https://www.exploit-db.com/exploits/51006x-refsource-misc, exploit, third-party-advisory, vdb-entry
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2022-1040us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.