What’s Vulnerable › Vulnerabilities

CVE-2017-13821

• Severity: medium (CVSS 5.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2017-11-13 · updated 2026-06-17
• Weakness: CWE-200

Description

An issue was discovered in certain Apple products. macOS before 10.13.1 is affected. The issue involves the "CFString" component. It allows attackers to bypass intended memory-read restrictions via a crafted app.

Affected products

• macOS: through 10.13.0

References

• http://www.securitytracker.com/id/1039710
• https://support.apple.com/HT208221
• http://www.securitytracker.com/id/1039710
• https://support.apple.com/HT208221

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