CVE-2018-4456

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.11% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 63.6% of scored records. A rank, not a probability.

NVD base score

7.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2019-04-03 17:43Z7 YR AGO

Last updated

2024-08-05 05:18Z2 YR AGO

Reserved

2018-01-02

Assigning CNA

apple

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass

Data version

5.1

Document digest

429084a9768488f44957220d227acee25d7c7774515d57ca4ba89930c8a3c8bc

• support.apple.comhttps://support.apple.com/kb/HT209139x_refsource_MISC
• support.apple.comhttps://support.apple.com/kb/HT208937x_refsource_MISC
• support.apple.comhttps://support.apple.com/kb/HT209341x_refsource_MISC
• seclists.org20190513 APPLE-SA-2019-5-13-2 macOS Mojave 10.14.5, Security Update 2019-003 High Sierra, Security Update 2019-003 Sierrahttp://seclists.org/fulldisclosure/2019/May/20mailing-listx_refsource_FULLDISC
• support.apple.comhttps://support.apple.com/kb/HT210119x_refsource_CONFIRM
• seclists.org20190514 APPLE-SA-2019-5-13-2 macOS Mojave 10.14.5, Security Update 2019-003 High Sierra, Security Update 2019-003 Sierrahttps://seclists.org/bugtraq/2019/May/27mailing-listx_refsource_BUGTRAQ