Sophos Firewall appliances End of Life (EOL) Dates & Support Timeline

Sophos Firewall appliances lifecycle status — the real story

Sophos Firewall appliance hardware, the XGS series (current), the XG series and the SG series, from Sophos's own retirement calendar KBA-000003353 (XGS, XG and SG appliance tables; article dated Sep 03, 2026, read 2026-09-09 in a browser). Mapping: eol = EOL (the day support and RMAs cease), support = Last renewal date (the last day a subscription or support term can be extended), lastOrderDay = EOS; the Migration path column is carried per model. Models Sophos lists with every milestone 'None declared' are current with no dates. Release dates are not on the page and are left null.

As read: all 23 XG models are past EOL (17-Aug-2022 for the XG 85, 85w, 105 and 105w; 31-Mar-2025 for the rest); all 16 SG models reached EOL 30-Jun-2026 (an SG appliance running SFOS follows the corresponding XG model's dates instead); the ten first-generation XGS desktop models (87 through 136w) have EOS dates in 2025 with EOL 30-Sep-2030 and named XGS 88 to 138 successors; the remaining 19 XGS models have no milestones declared.

KEV context: CISA's Sophos entries name the software (SFOS, Firewall, XG Firewall, SG UTM), which is tracked on the sophos-firewall and sophos-utm pages; this hardware page carries no KEV join of its own.

Sophos Firewall appliances release and support pattern

Of the 68 release lines tracked, 39 are past end of life and 29 are still within support. The next scheduled end of life is XGS 87 on September 30, 2030 — 1481 days from this build. The longest-supported line currently published is XGS 136w, to September 30, 2030.

Computed from the tracked release data at every build — the figures above are the dates in the table, restated, not an editorial estimate.

What does Sophos Firewall appliances end of life mean for your organization?

When a version of Sophos Firewall appliances reaches end of life, the maintainers stop issuing security patches. Vulnerabilities discovered after this date are publicly disclosed on the National Vulnerability Database, exploit code appears on GitHub, and your systems remain permanently exposed.

The CVE blind spot: Most vulnerability scanners check for known CVEs but do not flag the accumulation of unpatched vulnerabilities in EOL software. With a zero-day, nobody knows about the vulnerability. With EOL software, the vulnerability is public — listed, rated, and often weaponized — but no patch will ever exist. This is the most dangerous gap in enterprise security posture.

Organizations running EOL Sophos Firewall appliances should treat it as a vulnerability class in their risk register, apply compensating controls (network segmentation, enhanced monitoring, access restriction), and prioritize migration to a supported version.

Your options when Sophos Firewall appliances reaches end of life

There are four realistic paths. Which one is right depends far more on how long the system needs to keep running than on the version you are on today.

How to choose, in one question: how many more years does this system need to run? Under a year, extended support (where it exists) is usually cheaper than an emergency migration. One to three years, migrate — support purchased repeatedly costs more than doing the project once, and the project only gets harder as the version ages. Indefinitely, migrate now and plan the next migration before it surprises you.

Worth saying plainly, because vendors selling extended support rarely will: extended support is often the more expensive choice over a multi-year horizon. It is the right answer when a deadline is genuinely unreachable, not as a default. Compare the annual fee against the one-time cost of migrating before committing to either.

Formalizing decisions like this across your estate? Our free EOL policy template is a ready-to-adopt policy with risk tiers, remediation SLAs, and audit mapping — no signup, free to use and share.

Extended Support Options

If you cannot migrate immediately, extended support vendors provide continued security patches for EOL Sophos Firewall appliances versions. This is a bridge, not a permanent solution — plan your migration in parallel.

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