CVE-2018-4256
CVE-2018-4256 is a medium-severity vulnerability in Apple Mac Os X with a CVSS 3.x base score of 5.5. 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-125.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- CVSS v2: 2.1
- EPSS exploit prediction: 0% (21st percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-125
- Affected product: Apple Mac Os X
- Published:
- Last modified:
Description
In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.
Frequently asked questions
- What is CVE-2018-4256?
- In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.
- How severe is CVE-2018-4256?
- CVE-2018-4256 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2018-4256 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (21st percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-4256?
- CVE-2018-4256 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-4256?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- When was CVE-2018-4256 published?
- CVE-2018-4256 was published on 2019-01-11 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:o:apple:mac_os_x:*:*:*:*:*:*:*:*
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