CVE-2018-18667 json
The mintToken function of Pylon (PYLNT) aka PylonToken, an Ethereum token, has an integer overflow that allows the owner of the contract to…
published 2018-12-28 7 y ago modified 2026-06-17 4 mo ago also EUVD-2018-10383
- cvss
- 7.5
- version 3.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.4%
- EPSS 1.4% chance of exploitation in 30 days, percentile 73%
- public exploits
- 0
- none known
Summary
The mintToken function of Pylon (PYLNT) aka PylonToken, an Ethereum token, has an integer overflow that allows the owner of the contract to set the balance of an arbitrary user to any value, a related issue to CVE-2018-11812.
Exploit prediction
1.42% chance of exploitation in the next 30 days, higher than 73% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/n0pn0pn0p/smart_contract_-vulnerability/blob/master/PolyAi.md referenced PoC, tagged "exploit" by a source, unverified
- github.com https://github.com/klenergy/ethereum-contracts/issues/1 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-190 Integer Overflow or Wraparound
References
-
github.com
/n0pn0pn0p/smart_contract_-vulnerability/blob/master/PolyAi.md
exploit, third-party-advisory
-
github.com
/klenergy/ethereum-contracts/issues/1
exploit, third-party-advisory
-
etherscan.io
/address/0x7703c35cffdc5cda8d27aa3df2f9ba6964544b6e#code
third-party-advisory
Sources
- CVE List CVE-2018-18667
- NVD CVE-2018-18667
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