CVE-2022-1040
CriticalExploitedPublic exploitAn 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.
Published Sep 26, 2022 · Updated Oct 21, 2025 · Also known as TR-22-0267
Key Facts
Patch immediately- CVE-2022-1040 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Sfos (Sophos), Sophos Firewall.
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 21, 2022 and is known to be used in ransomware campaigns. Public exploit code is available.
- EPSS estimates a 100% probability of exploitation in the next 30 days.
- Fixed versions are available, including Sfos <=18.5.3, Sfos 18.5.3.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v3.1
9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS (30-day exploit likelihood)
100%
Higher than 99.9% of all scored CVEs
Exploited in the wild
Yes
4 catalog listings, used by ransomware
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2022-1040 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
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.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Mar 31, 2022 | Apr 21, 2022 | Not reported |
| Industry KEV feed | Mar 21, 2022 | Apr 21, 2022 | Known |
| CIRCL KEV | Mar 31, 2022 | Apr 21, 2022 | Not reported |
| ENISA EUVD | Mar 31, 2022 | n/a | Not reported |
Required action: Apply updates per vendor instructions.
Affected Products
2 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| SfosSophos | See advisory | 18.5.3 |
| Sophos Firewall | >= unspecified | n/a |
Patched Releases
Sfos
<=18.5.3
Timeline
Added to Industry KEV feed
Mar 21, 2022
Added to CISA KEV
Mar 31, 2022
Added to CIRCL KEV
Mar 31, 2022
Added to ENISA EUVD
Mar 31, 2022
Publicly disclosed
Sep 26, 2022
Last updated
Oct 21, 2025
References
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2022-1040
- advisoryhttps://nvd.nist.gov/vuln/detail/CVE-2022-22274
- advisoryhttps://psirt.global.sonicwall.com/vuln-detail/SNWLID-2022-0003
- advisoryhttps://thehackernews.com/2022/03/critical-sonicos-vulnerability-affects.html
- advisoryhttps://thehackernews.com/2022/03/critical-sophos-firewall-rce.html
FAQ
Common Questions.
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.
Affected: Sfos (Sophos); Sophos Firewall versions >= unspecified. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 21, 2022 and is known to be used in ransomware campaigns.
Yes. It was added on Mar 31, 2022 with a federal remediation due date of Apr 21, 2022.
Public exploit code is available.
Fixed versions are available, including Sfos <=18.5.3, Sfos 18.5.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
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