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Fencer Vulns
high 7.5

CVE-2021-3195 json

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 dump…

published 2021-01-21 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-26536

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
1.3%
EPSS 1.3% chance of exploitation in 30 days, percentile 70%
public exploits
0
none known

Summary

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

Patch / fix

  • bitcoin openSUSE Leap 16.0 27.1-bp160.2.1
  • bitcoin Package Hub 15 SP3, openSUSE Leap 15.3 0.21.2-bp153.2.3.1

opensuse advisories openSUSE-SU-2026:21149-1openSUSE-SU-2022:0072-1

  • bitcoin Alpine 3.18, Alpine 3.17, Alpine 3.16 +2 more 0.21.1-r0

alpine advisories ALPINE-CVE-2021-3195

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Exploit prediction

1.30% chance of exploitation in the next 30 days, higher than 70% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/bitcoin/bitcoin/issues/20866 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:P/A:N

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.