Zherbert 2085070195702268321
zherbert-2085070195702268321
- Author
- @zherbert
- Organisation
- independent
- Evidence role
- independent-technical-analysis
- Posted
- 5 Aug 2026, 18:27 UTC
- Capture status
- capture held
Zach Herbert identifying the 2021 bug precisely: COLDCARD 4.0.0 initialised ckcc_vcp_enabled to true, so once USB was active a connected computer could send Control-C, drop into the MicroPython REPL and reach wallet secrets, with 4.0.1 defaulting the flag to false. He states the 4.0.0 to 4.0.1 diff makes it clear and notes Coinkite has since named it the USB serial REPL vulnerability. The most specific captured rebuttal of the THEY'VE KNOWN FOR YEARS reading, and recheckable against the public diff. Herbert is Foundation's CEO, a competing hardware wallet vendor, which is stated because the post exonerates Coinkite on this particular point.
This post is registered as evidence and has a locally held capture. The original remains the canonical publication. Last checked .
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Snapshot and diff bodies for this chain monitor are held in the local evidence archive but withheld from the public site because they can contain the addresses of people who published nothing themselves. Capture times and reviewed change summaries remain available below.
Held captures
0 presentation-noise differences. Sidebar, ticker and other page chrome churn that our review classified as not being changes to what the source says.
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