Is CVE-2018-4174 in the CISA KEV catalog?

No. CVE-2018-4174 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2018-4174?

CVE-2018-4174 has a CVSS v3 base score of 5.9 (MEDIUM).

What is the EPSS score for CVE-2018-4174?

CVE-2018-4174 has an EPSS score of 1.51% (71th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2018-4174?

Upgrade iphone os to 11.3 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2018-4174

MEDIUMEPSS 71th pctl

5.9

CVSS v3

NVD

Description

An issue was discovered in certain Apple products. iOS before 11.3 is affected. macOS before 10.13.4 is affected. The issue involves the "Mail" component. It allows man-in-the-middle attackers to read S/MIME encrypted messages by leveraging an inconsistency in the user interface.

How to fix

Remediation Available

iphone osNVD

Affected:< 11.3Fixed in:11.3CVE-2018-4174derived from NVD

mac os xNVD

Affected:< 10.13.4Fixed in:10.13.4CVE-2018-4174derived from NVD

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

1.51%probability of exploitation in 30 days

71stpercentile

Elevated risk: more likely to be exploited than 71% of all known CVEs.

References

Vendor Advisory2

Third-Party Advisory3

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.