CVE-2015-6964: MultiBit HD before 0.1.2 allows attackers to conduct bit-flipping attacks that insert unspendable Bitcoin addr

Q: How do I fix CVE-2015-6964?

multibit hd: upgrade to 0.1.2. Exact commands for each OS are on this page.

Q: Is CVE-2015-6964 being exploited?

CVE-2015-6964 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2015-6964 affect?

CVE-2015-6964 affects multibit hd. Severity is medium (CVSS 5.3). MultiBit HD before 0.1.2 allows attackers to conduct bit-flipping attacks that insert unspendable Bitcoin addresses into the list that MultiBit uses to send fees to the developers. (Attackers cannot realistically steal these fees for themse

Q: How urgent is CVE-2015-6964?

Priority 40/100. Public exploit reference; Remotely exploitable, no login, no user action

This week

MEDIUM 5.3REMOTEUPGRADE

CVE-2015-6964 is a medium-severity flaw (CVSS 5.3) affecting multibit hd. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

MultiBit HD before 0.1.2 allows attackers to conduct bit-flipping attacks that insert unspendable Bitcoin addresses into the list that MultiBit uses to send fees to the developers. (Attackers cannot realistically steal these fees for themselves.) This occurs because there is no message authentication code (MAC).

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.5% (top 56%)
CISA exploited list	No
Weakness	CWE-697
Published	2023-09-25
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: multibit

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-09-25 05:15 UTCPublished CVE record published
2026-06-17 00:31 UTCUpdated Record last modified

multibit multibit hd UPGRADE

Affected: < 0.1.2

Fixed in: 0.1.2

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy multibit-hd || rpm -q multibit-hd || multibit-hd --version

2. UPGRADE to 0.1.2 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade multibit-hd

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade multibit-hd

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2015-6964?

multibit hd: upgrade to 0.1.2. Exact commands for each OS are on this page.

Is CVE-2015-6964 being exploited?

CVE-2015-6964 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2015-6964 affect?

CVE-2015-6964 affects multibit hd. Severity is medium (CVSS 5.3). MultiBit HD before 0.1.2 allows attackers to conduct bit-flipping attacks that insert unspendable Bitcoin addresses into the list that MultiBit uses to send fees to the developers. (Attackers cannot realistically steal these fees for themse

How urgent is CVE-2015-6964?

Priority 40/100. Public exploit reference; Remotely exploitable, no login, no user action

References

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