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CVE-2018-4400
A validation issue was addressed with improved logic. This issue affected versions prior to iOS 12.1, macOS Mojave 10.14.1, watchOS 5.1.
Medium5.5EPSS 0.91%
- Published
- Updated
- Reserved
- Assigned by
- apple
Description
A validation issue was addressed with improved logic. This issue affected versions prior to iOS 12.1, macOS Mojave 10.14.1, watchOS 5.1.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.0 | Medium5.5 | CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.91% · top 40% of all CVEs (5 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Weakness
- Processing a maliciously crafted S/MIME signed message may lead to a denial of service
- CWE-20 (opens in a new tab)All about CWE-20 and its CVEs
Affected products
iOS, macOS, watchOS
- affected Versions prior to: iOS 12.1, macOS Mojave 10.14.1, watchOS 5.1
References (3)
- https://support.apple.com/kb/HT209193 (opens in a new tab)x_refsource_MISCx_transferred
- https://support.apple.com/kb/HT209192 (opens in a new tab)x_refsource_MISCx_transferred
- https://support.apple.com/kb/HT209195 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2018-4400)Record last updated .