Bitcoin’s cryptographic security isn’t just about whether secp256k1 is “broken.” Recent vulnerabilities show risks across the entire stack: • CVE-2024-49364 — private-key extraction • CVE-2024-48930 — ECDH private-key extraction • CVE-2023-49292 — private-key recovery • CVE-2023-39910 — weak wallet entropy • CVE-2021-38195 — invalid signature acceptance • CVE-2019-25003 — timing side channel CVE-2023-39910 (Milk Sad) was exploited in the wild, enabling recovery of vulnerable wallet private keys and theft of funds. August 2026 adds another warning: a Coldcard wallet flaw was linked to coordinated attacks reportedly draining nearly $89M from 1,000+ Bitcoin wallets. And vulnerabilities don’t always have CVEs. Reused/predictable ECDSA nonces, RNG failures, invalid-curve attacks, side channels, firmware bugs and supply-chain compromises can all threaten private keys. Bitcoin also relies on Schnorr signatures through BIP-340 and Taproot (BIP-341/342), not just ECDSA. Then there’s the long-term threat: quantum computers could eventually break the elliptic-curve cryptography securing Bitcoin. The risk isn’t that secp256k1 has suddenly been cracked. The risk is the entire security stack. Bitcoin needs continuous cryptographic auditing, secure randomness and nonce generation, hardened implementations, responsible disclosure, and a credible post-quantum migration path — before the threat becomes urgent.
Post summary
The tweet highlights that multiple Bitcoin-related CVEs, notably CVE-2023-39910, have been actively exploited in the wild to compromise wallet keys and steal funds, emphasizing the ongoing risk across the entire blockchain security stack.