Tapo C420 v1

Gone quiet reasonably evidenced

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

229 days since the last release against a median gap of 44 (5.2x)

Last firmware: 12 February 2026 (8 months ago)
Releases seen: 14
Update rhythm: about every 44 days
Support observed: ≥3 years
Vendor's promise: 11 July 2027 — not being kept: silent well before this date
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.

Tapo C420 v1.26 (US) Gone quiet 1 releases
Tapo C420 v1.6 (US) Gone quiet 11 releases

Firmware history

Tapo C420(US)_V1_1.4.2 Build 20251226 12 February 2026

Release notes — disclosure 0.45

Modifications and Bug Fixes: 1. Fixed the issue where Device Settings pages in the Tapo app would be blank in some cases. 2. Enhanced device security. 3. Improved device performance.

Archived page, fetched 29 September 2026

Tapo C420(US)_V1_1.4.1 Build 20250912 17 November 2025
Release notes — disclosure 0.28
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Modifications and Bug Fixes: 1. Enhanced device security and stability. 2. Improved live feed performance.
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Archived page, fetched 29 September 2026
Tapo C420(US)_V1_1.3.1 Build 20241218 14 January 2025
Release notes — disclosure 0.31
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Modifications and Bug Fixes: Added support for Migrate Connected Devices feature.
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Archived page, fetched 29 September 2026

Tapo C420(US)_V1_1.2.17 Build 20240305 19 March 2024

Release notes — disclosure 0.45

Modifications and Bug Fixes: 1. Optimized the issue of the Alarm not ringing in some cases. 2. Enhanced device stability. 3. Fixed some minor bugs.

Archived page, fetched 29 September 2026

Tapo C420(US)_V1_1.2.16 Build 20240122 2 February 2024

Release notes — disclosure 0.44

Modifications and Bug Fixes: 1. Optimized the live streaming performance. 2. Optimized the AI detection performance. 3. Optimized the camera battery life. 4. Enhanced device stability. 5. Fixed some minor bugs.

Archived page, fetched 29 September 2026

Tapo C420(US)_V1_1.2.15 Build 20231013 26 December 2023

Release notes — disclosure 0.55

Modifications and Bug Fixes: 1. Added support for more functions in the Battery Status page to better know and record the battery usage details. 2. Added support for any quadrilateral area configuration under AI and Motion Detection Activity Zones. 3. Added support for different working modes with varying detection and recording parameters to balance performance and power consumption. 4. Optimized detection performance. 5. Optimized the camera battery life. 6. Fixed some minor bugs.

Archived page, fetched 29 September 2026

Tapo C420(US)_V1_1.2.14 Build 20230829 15 September 2023
Release notes — disclosure 0.49
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Modifications and Bug Fixes: 1. Optimized the Motion Detection function. 2. Optimized the SD card recording function. 3. Fixed some minor bugs.
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Archived page, fetched 29 September 2026
Tapo C420(US)_V1_1.2.12 Build 20230727 16 August 2023
Release notes — disclosure 0.41
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Modifications and Bug Fixes: 1. Add support for customizing Image Style and Brightness under Image Settings. 2. Fix some minor bugs.
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Archived page, fetched 29 September 2026
Tapo C420(US)_V1_1.2.11 Build 20230726 29 July 2023
Release notes — disclosure 0.32
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Modifications and Bug Fixes: Fix the problem of false motion detection in some cases.
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Archived page, fetched 29 September 2026

Tapo C420(US)_V1_1.2.9 Build 20230626 12 July 2023

Release notes — disclosure 0.53

Modifications and Bug Fixes: 1. Added support for any quadrilateral area configuration under Activity Zones. 2. Added three new alarm tones and raise the alarm volume. 3. Optimized detection notification. 4. Improved detection clip integrity. 5. Improved PIR sensitivity. 6. Fixed some minor bugs.

Archived page, fetched 29 September 2026

Tapo C420(US)_V1_1.2.7 Build 20230426 12 May 2023
Release notes — disclosure 0.34
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Modifications and Bug Fixes: 1. Optimize Detection performance. 2. Fix some minor bugs.
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Archived page, fetched 29 September 2026
Tapo C420(US)_V1_1.2.6 Build 20230224 29 March 2023
Release notes — disclosure 0.41
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Modifications and Bug Fixes: 1. Improve camera battery life. 2. Fix some minor bugs.
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Archived page, fetched 29 September 2026
Tapo C420(US)_V1_1.2.5 Build 20230129 14 February 2023
Release notes — disclosure 0.34
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Modifications and Bug Fixes: 1. Enhance stability of the camera. 2. Fix some minor bugs.
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Archived page, fetched 29 September 2026

Tapo C420(US)_V1_1.2.4 Build 20221208 3 January 2023

Release notes — disclosure 0.41

Modifications and Bug Fixes: 1. Improved liveview performance. 2. Enhanced stability of the camera. 3. Improved performance of the camera. 4. Fixed some minor bugs.

Archived page, fetched 29 September 2026

Evidence

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

Identifiers: marketing_name Tapo C420

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

Machine-readable: JSON · RSS