CVE-2018-11687
CVSS v3
7.5
HIGH
EPSS Score
1.4 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An integer overflow in the distributeBTR function of a smart contract implementation for Bitcoin Red (BTCR), an Ethereum ERC20 token, allows the owner to accomplish an unauthorized increase of digital assets by providing a large address[] array, as exploited in the wild in May 2018, aka the "ownerUnderflow" issue.
Technical details
- Published
- 2018-08-15
Frequently asked questions
What is CVE-2018-11687?
An integer overflow in the distributeBTR function of a smart contract implementation for Bitcoin Red (BTCR), an Ethereum ERC20 token, allows the owner to accomplish an unauthorized increase of digital assets by providing a large address[] array, as exploited in the wild in May 2018, aka the "ownerUnderflow" issue.
Is CVE-2018-11687 actively exploited?
Active exploitation of CVE-2018-11687 has not been confirmed. Its EPSS score was 1.4% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2018-11687?
CVE-2018-11687 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2018-11687 affecting your environment?
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