CVE-2018-4257
In macOS High Sierra before 10.13.5, a buffer overflow was addressed with improved size validation.
In macOS High Sierra before 10.13.5, a buffer overflow was addressed with improved size validation.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
In macOS High Sierra before 10.13.5, a buffer overflow was addressed with improved size validation.
- Record
CVE-2018-4257- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 10.0 High
AV:N/AC:L/Au:N/C:C/I:C/A:C - Weakness
- CWE-119
- Updated
- 2026-11-02
CVE List No score
In macOS High Sierra before 10.13.5, a buffer overflow was addressed with improved size validation.
- Record
CVE-2018-4257- Updated
- 2026-11-02
EUVDEUVD-2018-16043 No score
In macOS High Sierra before 10.13.5, a buffer overflow was addressed with improved size validation.
- Record
EUVD-2018-16043- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-wvmc-f227-wm5v
In macOS High Sierra before 10.13.5, a buffer overflow was addressed with improved size validation.
In macOS High Sierra before 10.13.5, a buffer overflow was addressed with improved size validation.
- Record
GHSA-wvmc-f227-wm5v- CVSS 3.0
- 9.8 Critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-119
- Updated
- 2026-11-02
Affected products
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2018-4257 is a critical vulnerability (CVSS 9.8) in Apple Mac Os X, published January 11, 2019. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 1.29%, the 70th percentile. No source names a fixed version.