COLDCARD Security Advisory A seed-generation defect affected releases beginning with firmware 4.0.1. Fixed firmware is available. Existing affected seeds still require migration. Check status

COLDCARD Mk3 and Mk2 Downloads

Date Size (bytes) Platform Version Filename Description
2026-07-31 760,637 Mk3 4.2.0 [current fixed release] 2026-07-31T1248-v4.2.0-coldcard.dfu Final release for Mk3 and Mk2 COLDCARD
2023-06-26 760,637 Mk3 4.1.9 [vulnerable] 2023-06-26T1241-v4.1.9-coldcard.dfu
2023-06-19 753,981 Mk3 4.1.8 [vulnerable] 2023-06-19T1627-v4.1.8-coldcard.dfu
2022-11-14 760,637 Mk3 4.1.7 [vulnerable] 2022-11-14T1854-v4.1.7-coldcard.dfu
2022-10-05 760,125 Mk3 4.1.6 [vulnerable] 2022-10-05T1517-v4.1.6-coldcard.dfu
2022-05-04 759,101 Mk3 4.1.5 [vulnerable] 2022-05-04T1258-v4.1.5-coldcard.dfu
2022-04-25 759,101 Mk3 4.1.4 [vulnerable] 2022-04-25T1618-v4.1.4-coldcard.dfu
2021-09-02 758,077 Mk3 4.1.3 [vulnerable] 2021-09-02T1752-v4.1.3-coldcard.dfu
2021-07-28 757,053 Mk3 4.1.2 [vulnerable] 2021-07-28T1347-v4.1.2-coldcard.dfu
2021-04-07 748,349 Mk3 4.0.2 [vulnerable] 2021-04-07T1424-v4.0.2-coldcard.dfu
2021-03-29 744,765 Mk3 4.0.1 [vulnerable] 2021-03-29T1927-v4.0.1-coldcard.dfu
2021-01-14 816,957 Mk3 3.2.2 2021-01-14T1617-v3.2.2-coldcard.dfu
2021-01-07 812,349 Mk3 3.2.1 2021-01-07T1439-v3.2.1-coldcard.dfu