Cisco Catalyst 3750-X Series — End-of-Life & EOSL Dates
Stackable access switch with StackWise Plus and StackPower. The switch hardware is past Cisco support as of Oct 2021.
Is the Cisco Catalyst 3750-X Series end of life?
Past end of serviceEvery tracked Cisco Catalyst 3750-X Series SKU group is past Cisco end of service life (last group Oct 2021). Units in production should be treated as unsupported. For past-EOSL units, weigh third-party maintenance, spares, replacement, or a documented run-to-failure. Cisco’s named migration path: Cisco Catalyst 3650 / 3850 Series.
Why this score
- Past end of service life — 58 months ago
- Vendor-published date, source-linked
- Vendor-named replacement / migration path available
- Category: stackable access switch
The score reflects support-lifecycle timing and source confidence only — higher means more support runway. It is not a risk, safety or compliance rating. How it’s calculated →
Documented real-world exploitation of out-of-support units
Public security reporting documents active exploitation affecting this product line — summarized here because units past their last date of support no longer receive vendor fixes. This describes the published campaigns, not the state of any specific device.
Static Tundra campaign (2025) · CVE-2018-0171
Cisco Talos and the FBI reported (August 2025) that Static Tundra, a Russian state-sponsored group linked to FSB Center 16, is compromising unpatched and end-of-life Cisco IOS devices via the Smart Install feature (CVE-2018-0171) for long-term espionage. The Catalyst 3750-X is an IOS access-switch line with the Smart Install client feature; units past end of support no longer receive IOS security fixes, so Cisco's guidance for unpatched devices is to disable Smart Install.
Sources: Cisco Talos — Static Tundra report ↗ · Cisco advisory — CVE-2018-0171 (Smart Install) ↗
Switch hardware (EOL10623)
EOSL — PAST12 SKUs in this group
Options from here
Unsupported nowThe Cisco Catalyst 3750-X Series is past Cisco end of service life. These are the paths teams take from here:
Keep it in production past the OEM cutoff with an independent maintainer.
Buy spares now, while units still circulate on the secondary market.
It is unsupported today — set a migration timeline and budget.
Low-criticality role — document the risk, harden backups, retire on your terms.
Independent and informational — EOSL.ai sells no hardware or maintenance and lists no paid placements. Third-party maintenance keeps unsupported gear in production past the OEM cutoff; whether it fits depends on the asset's role.
Catalyst 3750-X Series — questions
Is the Cisco Catalyst 3750-X Series end of life?
Yes — every tracked 3750-X Series SKU group is past its last date of support.
What is the last date of support for the 3750-X Series?
Oct 2021 — per the Cisco EOL bulletin.
Where do these 3750-X Series dates come from?
Every end-of-sale and end-of-service-life date on this page links to the official Cisco EOL bulletin it was taken from.
What is the replacement for the 3750-X Series?
Cisco's end-of-life bulletin lists Cisco Catalyst 3650 / 3850 Series as the recommended migration path for the 3750-X Series. Exact per-part-number replacements are in the linked bulletin.
More Cisco Catalyst · compare all 29 models →
On the same timetable
Embed this status on your wiki or README
