CVE-2018-10831: Z-NOMP before 2018-04-05 has an incorrect Equihash solution verifier that allows attackers to spoof mining sha

Q: How do I fix CVE-2018-10831?

z-nomp: upgrade to newer than 1.0.5. Exact commands for each OS are on this page.

Q: Is CVE-2018-10831 being exploited?

CVE-2018-10831 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-2018-10831 affect?

CVE-2018-10831 affects z-nomp. Severity is high (CVSS 7.5). Z-NOMP before 2018-04-05 has an incorrect Equihash solution verifier that allows attackers to spoof mining shares, as demonstrated by providing a solution with {x1=1,x2=1,x3=1,...,x512=1} to bypass this verifier for any blockheader. This or

Q: How urgent is CVE-2018-10831?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

This week

HIGH 7.5REMOTEUPGRADE

CVE-2018-10831 is a high-severity flaw (CVSS 7.5) affecting z-nomp. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Z-NOMP before 2018-04-05 has an incorrect Equihash solution verifier that allows attackers to spoof mining shares, as demonstrated by providing a solution with {x1=1,x2=1,x3=1,...,x512=1} to bypass this verifier for any blockheader. This originally affected (for example) the Bitcoin Gold and Zcash cryptocurrencies, and continued to be exploited in the wild in May 2018 against smaller cryptocurrencies.

Why this priority

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

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.7% (top 47%)
CISA exploited list	No
Weakness	CWE-327
Published	2018-05-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: zclassic

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

Am I affected?

Timeline

2018-05-09 05:29 UTCPublished CVE record published
2026-06-17 01:34 UTCUpdated Record last modified

zclassic z-nomp UPGRADE

Affected: <= 1.0.5

Fixed in: newer than 1.0.5

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy z-nomp || rpm -q z-nomp || z-nomp --version

2. UPGRADE to newer than 1.0.5 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade z-nomp

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade z-nomp

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-2018-10831?

z-nomp: upgrade to newer than 1.0.5. Exact commands for each OS are on this page.

Is CVE-2018-10831 being exploited?

CVE-2018-10831 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-2018-10831 affect?

CVE-2018-10831 affects z-nomp. Severity is high (CVSS 7.5). Z-NOMP before 2018-04-05 has an incorrect Equihash solution verifier that allows attackers to spoof mining shares, as demonstrated by providing a solution with {x1=1,x2=1,x3=1,...,x512=1} to bypass this verifier for any blockheader. This or

How urgent is CVE-2018-10831?

Priority 49/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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