Sophos Firewall appliances SG 550 · Version Status
Sophos Firewall appliances SG 550 End of Life Date
Sophos Firewall appliances SG 550 end-of-life date, support status, and CVE risk. Data reconciled from official vendor documentation and endoflife.date at every build; the source of each date is on the product page.
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Sophos Firewall appliances SG 550 is past end of life. This version no longer receives security patches. 71 days past EOL — migrate to a supported version immediately.
EOL Date
Jun 30, 2026
71 days past EOL
Latest Release
SG 550
Standard release
Release Date
—
Sophos Firewall appliances SG 550 series
Lifecycle detail
It has been without security patches for 2 months.
Attack Surface
10/30 Medium tier
CISA KEV Exposure
0/20 Not in KEV
Extended Support
0/10 Available
EOL Risk Score™ — proprietary methodology by endoflife.ai. Factors: EOL recency, attack surface breadth, CISA KEV catalog presence, extended support availability. Updated at every build.
Methodology → ·
View score card →
Extended Support
Extended Sophos Firewall appliances SG 550 support is available
Commercial vendors offer security patches beyond EOL. Compare your options.
Compare Options →
All Sophos Firewall appliances Versions
| Version | Latest | EOL Date | Status |
|---|
| XG 105w |
XG 105w |
Aug 17, 2022 |
EOL |
| XG 105 |
XG 105 |
Aug 17, 2022 |
EOL |
| XG 85w |
XG 85w |
Aug 17, 2022 |
EOL |
| XG 85 |
XG 85 |
Aug 17, 2022 |
EOL |
| XG 750 |
XG 750 |
Mar 31, 2025 |
EOL |
| XG 650 |
XG 650 |
Mar 31, 2025 |
EOL |
| XG 550 |
XG 550 |
Mar 31, 2025 |
EOL |
| XG 450 |
XG 450 |
Mar 31, 2025 |
EOL |
What does Sophos Firewall appliances SG 550 end of life mean?
When Sophos Firewall appliances SG 550 reaches end of life, the maintainers stop issuing security patches for this version. CVEs discovered after the EOL date are publicly disclosed on the National Vulnerability Database with no patch available. Exploit code frequently appears on GitHub within days of disclosure.
The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Running Sophos Firewall appliances SG 550 past its EOL date creates a permanently growing attack surface that standard security tooling will not surface.
Migrate to Sophos Firewall appliances XGS 88 or implement compensating controls — network segmentation, enhanced monitoring, restricted access — while migration is underway.
Frequently Asked Questions
When does Sophos Firewall appliances SG 550 reach end of life?
Sophos Firewall appliances SG 550 reached end of life on June 30, 2026. This version is no longer receiving security patches.
Is Sophos Firewall appliances SG 550 still supported?
No. Sophos Firewall appliances SG 550 reached end of life on June 30, 2026 and is no longer receiving security patches.
What should I upgrade to from Sophos Firewall appliances SG 550?
The recommended upgrade from Sophos Firewall appliances SG 550 is
Sophos Firewall appliances XGS 88 — the latest actively supported version. Check the
Sophos Firewall appliances full timeline for all supported versions.
What are the security risks of running Sophos Firewall appliances SG 550 past EOL?
When Sophos Firewall appliances SG 550 reaches end of life, the maintainers stop issuing security patches. Any CVEs disclosed after the EOL date accumulate with no remediation path. Most vulnerability scanners do not flag this — it is the CVE blind spot. Organizations running EOL Sophos Firewall appliances should migrate immediately or implement compensating controls.