CVE-2018-4256
In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input...
In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.
Attack profile
How easy it is to exploit
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- None
- Availability
- None
Exploit likelihood
What each source reports
NVD Score used
In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.
- Record
CVE-2018-4256- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - CVSS 2.0
- 2.1 Low
AV:L/AC:L/Au:N/C:P/I:N/A:N - Weakness
- CWE-125
- Updated
- 2026-11-02
CVE List No score
In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.
- Record
CVE-2018-4256- Updated
- 2026-11-02
EUVDEUVD-2018-16042 No score
In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.
- Record
EUVD-2018-16042- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v885-9h3j-rhmg
In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input...
In macOS High Sierra before 10.13.5, an out-of-bounds read was addressed with improved input validation.
- Record
GHSA-v885-9h3j-rhmg- CVSS 3.0
- 5.5 Medium
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N - Weakness
- CWE-125
- 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-2018-4256 is a medium vulnerability (CVSS 5.5) 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 0.29%, the 22nd percentile. No source names a fixed version.