CVE-2021-3195: Bitcoin Core

High severity, CVSS 7.5. EPSS: 1.2% chance of exploitation in the next 30 days.

bitcoind in Bitcoin Core through 0.21.0 can create a new file in an arbitrary directory (e.g., outside the ~/.bitcoin directory) via a dumpwallet RPC call. NOTE: this reportedly does not violate the security model of Bitcoin Core, but can violate the security model of a fork that has implemented dumpwallet restrictions

Affected products

• Bitcoin Bitcoin Core: up to and including 0.21.0

Published 2021-01-26. Last modified 2026-06-17.