CVE-2018-11239
CVE-2018-11239 is a high-severity vulnerability in Hexagontoken Hexagon with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 1% (56th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-190
- Affected product: Hexagontoken Hexagon
- Published:
- Last modified:
Description
An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets by providing a _to argument in conjunction with a large _value argument, as exploited in the wild in May 2018, aka the "burnOverflow" issue.
Frequently asked questions
- What is CVE-2018-11239?
- An integer overflow in the _transfer function of a smart contract implementation for Hexagon (HXG), an Ethereum ERC20 token, allows attackers to accomplish an unauthorized increase of digital assets by providing a _to argument in conjunction with a large _value argument, as exploited in the wild in May 2018, aka the "burnOverflow" issue.
- How severe is CVE-2018-11239?
- CVE-2018-11239 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
- Is CVE-2018-11239 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (56th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-11239?
- CVE-2018-11239 affects Hexagontoken Hexagon. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-11239?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2018-11239 published?
- CVE-2018-11239 was published on 2018-05-19 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:hexagontoken:hexagon:-:*:*:*:*:*:*:*
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