Z-NOMP before 2018-04-05 has an incorrect Equihash solution verifier that allows attackers to spoof mining shares, as demonstrated by provi…

published 2018-05-09 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-2900

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 0.7%; EPSS 0.7% chance of exploitation in 30 days, percentile 53%
public exploits: 0; none known

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.

Exploit prediction

0.69% chance of exploitation in the next 30 days, higher than 53% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

github.com https://github.com/edwardz246003/misc/blob/master/Attackers%20Fake%20Computational%20Power%20to%20Steal%20Cryptocurrencies%20from%20Mining%20Pools.md referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/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-327 Use of a Broken or Risky Cryptographic Algorithm

References

github.com /edwardz246003/misc/blob/master/Attackers%20Fake%20Computational%20Power%20to%20Steal%20Cryptocurrencies%20fro
exploit, technical-description, third-party-advisory
blog.zencash.com /update-for-the-equihash-mining-application-z-nomp/
third-party-advisory

Sources

CVE List CVE-2018-10831
NVD CVE-2018-10831

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.

Summary