CVE-2018-4257
CVE-2018-4257 is a critical-severity vulnerability in Apple Mac Os X with a CVSS 3.x base score of 9.8. 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-119.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 10.0
- EPSS exploit prediction: 1% (67th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-119
- Affected product: Apple Mac Os X
- Published:
- Last modified:
Description
In macOS High Sierra before 10.13.5, a buffer overflow was addressed with improved size validation.
Frequently asked questions
- What is CVE-2018-4257?
- In macOS High Sierra before 10.13.5, a buffer overflow was addressed with improved size validation.
- How severe is CVE-2018-4257?
- CVE-2018-4257 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2018-4257 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (67th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2018-4257?
- CVE-2018-4257 affects Apple Mac Os X. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2018-4257?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2018-4257 published?
- CVE-2018-4257 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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