Device Support-Lifespan Observatory

What vendors do, not what they announce.

TP-Link

TL-WR740N v4

Gone quiet well evidenced

no firmware for long enough to stand out against its own record

4275 days since the last release against a median gap of 132 (32.3x)

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Last firmware
15 January 2015 (12 years ago)
Releases seen
9
Update rhythm
about every 4 months
Support observed
≥3 years
Vendor's promise
no support period we can evaluate
Patch latency
not measurable — its changelogs name no CVE ids

Which one do I have?

TP-Link ships this model in more than one hardware revision, and they do not share firmware. The revision is printed on the label on the underside, usually after the model — Ver 1.0, V4.6. Getting it wrong is the easiest way to read the wrong answer here.

Firmware history

  1. TL-WR740N_V4_150105 15 January 2015

    Release notes — disclosure 0.35 
    Modifications and Bug Fixes: New Features/Enhancement：(1)Added the time zone of Columbia.Bug Fixed：(1)Fixed a bug that the router may not determined to be a UPnP device by Play Station 3.(2)Fixed a bug that PPPOE can't dial up successfully in some special situations.

    Archived page, fetched 29 September 2026

  2. TL-WR740N_V4_140520 20 May 2014

    Release notes — disclosure 0.32 
    Modifications and Bug Fixes: Improved wireless performance and fix some minor problem.

    Archived page, fetched 29 September 2026

  3. TL-WR740N_V4_130529 29 May 2013

    Release notes — disclosure 0.33 
    Modifications and Bug Fixes: Added GMT -4:30 Venezuela Caracas timezone;Changed Connect Automatically as the default connection type of PPPoE,L2TP and PPTP;Fixed some vulnerabilities and improved security;

    Archived page, fetched 29 September 2026

  4. TL-WR740N_V4_130329 29 March 2013

    Release notes — disclosure 0.33 
    Modifications and Bug Fixes: Improved web interface stabilityFixed a bug that the 8th wireless client with power save enabled will cause the instable issue to wireless network.

    Archived page, fetched 29 September 2026

  5. TL-WR740N_V4_130322 22 March 2013

    Release notes — disclosure 0.35 
    Modifications and Bug Fixes: Fixed the bug that failure of VLAN table creation will cause unit rebootFixed some vulnerabilities and improved securityFixed the bug that invalid URL request to the web server will cause server hang upImproved wireless connection stability

    Archived page, fetched 29 September 2026

  6. TL-WR740N_V4_130205 5 February 2013

    Release notes — disclosure 0.33 
    Modifications and Bug Fixes: Support multicast applicationsFixed a bug when WAN connection type is Static IP, Default Gateway or Primary DNS is 0.0.0.0, configuration can be saved

    Archived page, fetched 29 September 2026

  7. TL-WR740N_V4.20_120821 21 August 2012

    Release notes — disclosure 0.39 
    Notes: 1.The Firmware supports VLAN setting；2.VLAN is enabled by default and LAN1 supports VOIP，LAN2&3 supports Internet，LAN4 supports IPTV；You can login the Configuration Web Page through LAN2 and LAN3 with cable.4.If your ISP doesn't provides the service with VLAN，please ignore this firmware.5.If VLAN s disabled, this firmware works just as the same with the general version firmware without VLAN settings.6.The route for VLAN function is "Network->VLAN" on the Configuration Web Page

    Archived page, fetched 29 September 2026

  8. TL-WR740N_V4_120320 20 March 2012

    Release notes — disclosure 0.45 
    Modifications and Bug Fixes: Added IGMP Proxy function;Enhanced WPS(QSS) function to prevent illegal hacking;Fixed the bug that router may not do DNS request properly for LAN side client;Fixed the bug that LAN side client may get the IP address from WAN side;Fixed the bug that router only works at 20MHz bandwidth with Intel 5100 wireless adapter;Fixed the bug that virtual server can't open one internal port for several uncontinuous external ports;Fixed the bug that SSID with one or more blank space will cause Windows XP clients can not connect;Fixed the bug that WEP key can't be modified if local wireless and WDS link both use WEP security type;Fixed some display errors of LEDs;Fixed some display errors of Daylight Saving time;

    Archived page, fetched 29 September 2026

  9. TL-WR740N_V4_111130 30 November 2011

    Release notes — disclosure 0.32 
    Modifications and Bug Fixes: Fix the problem that LAN ports get the IP address assigned to WAN port

    Archived page, fetched 29 September 2026

Evidence

One archived page sits behind this record, the earliest read on 1 August 2026. Everything above was read from it, and each is kept byte for byte so it can be checked after the vendor edits the original.

Identifiers: marketing_name TL-WR740N

Judged by lifecycle-1 on 29 September 2026. How these verdicts are computed.

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