An integer overflow in the transferProxy function of a smart contract implementation for SmartMesh (aka SMT), an Ethereum ERC20 token, allo…

published 2018-04-25 8 y ago modified 2026-06-17 4 mo ago also EUVD-2018-2449

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 1.8%; EPSS 1.8% chance of exploitation in 30 days, percentile 78%
public exploits: 0; none known

An integer overflow in the transferProxy function of a smart contract implementation for SmartMesh (aka SMT), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets via crafted _fee and _value parameters, as exploited in the wild in April 2018, aka the "proxyOverflow" issue.

Exploit prediction

1.76% chance of exploitation in the next 30 days, higher than 78% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

peckshield.com https://peckshield.com/2018/04/25/proxyOverflow/ referenced PoC, tagged "exploit" by a source, unverified
reddit.com https://www.reddit.com/r/ethereum/comments/8esyg9/okex_erc20_bug/ 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

peckshield.com /2018/04/25/proxyOverflow/
exploit, third-party-advisory
reddit.com /r/ethereum/comments/8esyg9/okex_erc20_bug/
exploit, third-party-advisory
dasp.co /#item-3
not-applicable

Sources

CVE List CVE-2018-10376
NVD CVE-2018-10376

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