Sophos Firewall (SFOS)
Sophos · current 22.0
The current version of Sophos Firewall (SFOS) is 22.0 (as of 26/07/2026). patchletter checks the official source daily and emails you every new release.
Actively exploited vulnerabilities
The US cybersecurity agency CISA lists these vulnerabilities in its catalog of Known Exploited Vulnerabilities. Check your version and patch or mitigate promptly.
- CVE-2022-1040Sophos Firewall Authentication Bypass Vulnerability
9.8 critical · over the network, without login · CISA deadline was 21 Apr 22
- CVE-2022-3236Sophos Firewall Code Injection Vulnerability
9.8 critical · over the network, without login · CISA deadline was 14 Oct 22
- CVE-2020-15069Sophos XG Firewall Buffer Overflow Vulnerability
9.8 critical · over the network, without login · CISA deadline was 27 Feb 25
Source: CISA KEV. The CVE is matched to the product automatically — when in doubt, the linked NVD entry applies.
Sophos Firewall (SFOS) at a glance
Sophos Firewall OS (SFOS) is the operating system on Sophos XG/XGS firewalls, common in SMBs and mid-market. Sophos ships SFOS releases plus hotfixes and security advisories; as a perimeter device, timely patching is essential — Sophos firewalls have been the target of actively exploited flaws.
For admins the perimeter rules apply, sharpened: never expose the admin or VPN portal to the WAN unprotected, and apply hotfixes promptly (Sophos can push some automatically — keep that enabled). Take a config backup before firmware changes, mind the order on HA pairs, and verify VPN and rules afterwards. Track the SFOS version and its support window per model. Subscribe to Sophos advisories; patchletter surfaces new SFOS builds so critical updates aren't missed.
Support cycles (endoflife.date)
| Cycle | Latest version | Status |
|---|---|---|
| 19.5 | – | End of Life |
| 19.0 | – | End of Life |
| 18.5 | – | End of Life |
Version history & changelog · as detected by patchletter
| Version | Channel | Date | Notes |
|---|---|---|---|
| 22.0 | STABLE | 26/07/2026 | Release notes → |
Frequently asked questions
- What is the latest version of Sophos Firewall (SFOS)?
- Sophos Firewall (SFOS) 22.0, released 26/07/2026. patchletter checks the vendor's official source daily for new releases.
- Where can I find the Sophos Firewall (SFOS) release notes?
- The version history above links to the vendor's official release notes where the vendor publishes them. patchletter deliberately stores no vendor full texts.
- How do I get notified about new Sophos Firewall (SFOS) updates?
- Free by email: patchletter reports every new release — instantly or bundled as a digest. Unsubscribe anytime with one click.
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[](https://patchletter.com/en/software/sophos-sfos)https://patchletter.com/badge/sophos-sfos.svgAlso available: ?v=eol (end of support) and ?v=cve (actively exploited).
