Sophos Firewall appliances SG 135w · Version Status
Sophos Firewall appliances SG 135w End of Life Date
Sophos Firewall appliances SG 135w end-of-life date, support status, and CVE risk. Dates read at the vendor's own lifecycle pages (support.sophos.com); the source of each date is on the product page.
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Sophos Firewall appliances SG 135w is past end of life. This version no longer receives security patches. 118 days past EOL — migrate to a supported version immediately.
EOL Date
Jun 30, 2026
118 days past EOL
Latest Release
SG 135w
Standard release
Release Date
—
Sophos Firewall appliances SG 135w series
Where these dates come from
End of lifeJun 30, 2026Our catalog, built from the vendor pages · support.sophos.commedium · 1 source agrees End of active supportJun 30, 2025Our catalog, built from the vendor pages · support.sophos.commedium · 1 source agrees Confidence: high = two or more independent sources agree (the vendor's page read by our adapter, a person's check against the vendor, the dataset the date came from); medium = one; low = the vendor page disagrees or our last read is stale.
How we source dates.
Lifecycle detail
It has been past its end-of-life date for 4 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 135w support options
Some vendors and third parties sell security patches beyond end of life; whether one covers this version varies. 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 135w end of life mean?
When Sophos Firewall appliances SG 135w 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: A CVE-based scan does not show the ongoing accumulation of unpatched vulnerabilities in EOL software versions. Some scanners flag unsupported versions of common products, but coverage varies, and none of them give you the date in advance. Running Sophos Firewall appliances SG 135w past its EOL date creates a growing attack surface that a clean scan result does not rule out.
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 135w reach end of life?
Sophos Firewall appliances SG 135w reached end of life on June 30, 2026. This version is no longer receiving security patches.
Is Sophos Firewall appliances SG 135w still supported?
No. Sophos Firewall appliances SG 135w 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 135w?
The recommended upgrade from Sophos Firewall appliances SG 135w 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 135w past EOL?
Since Sophos Firewall appliances SG 135w reached end of life, the maintainers no longer issue security patches. Any CVEs disclosed after the EOL date accumulate with no vendor fix. A CVE-based scan does not show this — it is the CVE blind spot; some scanners flag unsupported versions of common products, but coverage varies and none give the date in advance. Organizations running EOL Sophos Firewall appliances should migrate immediately or implement compensating controls.