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CVE-2021-3401

34
FAUCET Score

CVE-2021-3401 describes a potential arbitrary code execution vulnerability in Bitcoin Core versions prior to 0.19.0. It could occur if another application unsafely passes the -platformpluginpath argument to the bitcoin-qt program, for instance, via a .desktop file handler or web browser. Despite a critical CVSS score of 9.8, the discoverer believes it is not practically exploitable, and its EPSS score is very low. There is no evidence of active exploitation, public exploit code, or significant community discussion or media coverage, suggesting a low real-world risk.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.19.0CPE matchmatch criteria
cpe:2.3:a:bitcoin:bitcoin:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
10.48%
Probability of exploitation in next 30 days
EPSS Percentile
95.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.1048 is in the 91st percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

github_advisorypatch availablevia nvd_reference
View patch

References

achow101.com / 2021/02/0.18-uri-vuln
Third Party Advisory
github.com / bitcoin/bitcoin/pull/16578
PatchThird Party Advisory