CVE-2021-33403
CVSS v3
7.5
HIGH
EPSS Score
1.2 %
exploit probability, as of 2026-09-25
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
An integer overflow in the transfer function of a smart contract implementation for Lancer Token, an Ethereum ERC20 token, allows the owner to cause unexpected financial losses between two large accounts during a transaction.
Technical details
- Published
- 2021-08-03
Frequently asked questions
What is CVE-2021-33403?
An integer overflow in the transfer function of a smart contract implementation for Lancer Token, an Ethereum ERC20 token, allows the owner to cause unexpected financial losses between two large accounts during a transaction.
Is CVE-2021-33403 actively exploited?
Active exploitation of CVE-2021-33403 has not been confirmed. Its EPSS score was 1.2% on 2026-09-25, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2021-33403?
CVE-2021-33403 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2021-33403 affecting your environment?
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