CVE-2020-6861: A flawed protocol design in the Ledger Monero app before 1.5.1 for Ledger Nano and Ledger S devices allows a l

Q: How do I fix CVE-2020-6861?

monero: upgrade to 1.5.1. Exact commands for each OS are on this page.

Q: Is CVE-2020-6861 being exploited?

CVE-2020-6861 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-2020-6861 affect?

CVE-2020-6861 affects monero. Severity is medium (CVSS 5.5). A flawed protocol design in the Ledger Monero app before 1.5.1 for Ledger Nano and Ledger S devices allows a local attacker to extract the master spending key by sending crafted messages to this app selected on a PIN-entered Ledger connecte

Q: How urgent is CVE-2020-6861?

Priority 34/100. Public exploit reference

Routine

MEDIUM 5.5UPGRADE

CVE-2020-6861 is a medium-severity flaw (CVSS 5.5) affecting monero. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A flawed protocol design in the Ledger Monero app before 1.5.1 for Ledger Nano and Ledger S devices allows a local attacker to extract the master spending key by sending crafted messages to this app selected on a PIN-entered Ledger connected to a host PC.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	5.5 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-327
Published	2020-05-06
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: ledger

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

Am I affected?

Timeline

2020-05-06 14:15 UTCPublished CVE record published
2026-06-17 03:23 UTCUpdated Record last modified

ledger monero UPGRADE

Affected: < 1.5.1

Fixed in: 1.5.1

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy monero || rpm -q monero || monero --version

2. UPGRADE to 1.5.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade monero

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade monero

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-2020-6861?

monero: upgrade to 1.5.1. Exact commands for each OS are on this page.

Is CVE-2020-6861 being exploited?

CVE-2020-6861 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-2020-6861 affect?

CVE-2020-6861 affects monero. Severity is medium (CVSS 5.5). A flawed protocol design in the Ledger Monero app before 1.5.1 for Ledger Nano and Ledger S devices allows a local attacker to extract the master spending key by sending crafted messages to this app selected on a PIN-entered Ledger connecte

How urgent is CVE-2020-6861?

Priority 34/100. Public exploit reference

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References

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