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
Published May 9, 2018
7.5
HIGHCVSS 3.0
EPSS 0.70%
Description
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.
Affected products
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
AV:N/AC:L/Au:N/C:N/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 0.70% (0.00704) | 51.69th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.70% (0.00704) | 51.87th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.24% (0.00237) | 62.19th | v3 (v2023.03.01) |
| Mar 18, 2024 | 0.24% (0.00237) | 60.99th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.44% (0.00436) | 73.96th | v3 (v2023.03.01) |
| Sep 30, 2023 | 0.44% (0.00436) | 71.71th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.43% (0.00425) | 70.31th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Feb 4, 2022 | 0.89% (0.00885) | 10.50th | v2 (v2022.01.01) |
| Feb 3, 2022 | 0.62% (0.00624) | 17.80th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
References (2)
- https://blog.zencash.com/update-for-the-equihash-mining-application-z-nomp/ x_refsource_MISCThird Party Advisory
- https://github.com/edwardz246003/misc/blob/master/Attackers%20Fake%20Computational%20Power%20to%20Steal%20Cryptocurrencies%20from%20Mining%20Pools.md x_refsource_MISCExploitTechnical DescriptionThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://blog.zencash.com/update-for-the-equihash-mining-application-z-nomp/ | x_refsource_MISCThird Party Advisory | |
| https://github.com/edwardz246003/misc/blob/master/Attackers%20Fake%20Computational%20Power%20to%20Steal%20Cryptocurrencies%20from%20Mining%20Pools.md | x_refsource_MISCExploitTechnical DescriptionThird Party Advisory |
Change history (0)
No recorded changes yet.