CVE-2018-4233

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

53.81% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 99.0% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

CVSS:3.0/AV:N/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

2018-06-08 18:00Z8 YR AGO

Last updated

2024-08-05 05:11Z2 YR AGO

Reserved

2018-01-02

Assigning CNA

apple

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Weaknesses

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

Data version

5.1

Document digest

13aa918efc8fd9a6a516032612c70d789d0199561d34f8a268f921c0153b8b6c

• support.apple.comhttps://support.apple.com/HT208850x_refsource_CONFIRM
• support.apple.comhttps://support.apple.com/HT208853x_refsource_CONFIRM
• support.apple.comhttps://support.apple.com/HT208851x_refsource_CONFIRM
• security.gentoo.orgGLSA-201808-04https://security.gentoo.org/glsa/201808-04vendor-advisoryx_refsource_GENTOO
• support.apple.comhttps://support.apple.com/HT208854x_refsource_CONFIRM
• www.securitytracker.com1041029http://www.securitytracker.com/id/1041029vdb-entryx_refsource_SECTRACK
• usn.ubuntu.comUSN-3687-1https://usn.ubuntu.com/3687-1/vendor-advisoryx_refsource_UBUNTU
• support.apple.comhttps://support.apple.com/HT208848x_refsource_CONFIRM
• www.exploit-db.com45998https://www.exploit-db.com/exploits/45998/exploitx_refsource_EXPLOIT-DB
• support.apple.comhttps://support.apple.com/HT208852x_refsource_CONFIRM
• packetstormsecurity.comhttp://packetstormsecurity.com/files/153148/Safari-Webkit-Proxy-Object-Type-Confusion.htmlx_refsource_MISC