CVE-2017-13903

7.5 highEPSS 1.1%

High (7.5) in apple. EPSS 1.1% chance of exploitation in the next 30 days.

An issue was discovered in certain Apple products. iOS before 11.2.1 is affected. tvOS before 11.2.1 is affected. The issue involves the "HomeKit" component. It allows remote attackers to modify the application state by leveraging incorrect message handling, as demonstrated by use of an Apple Watch to obtain an encryption key and unlock a door.

Severity

CVSS 3.0

7.5 high

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

EPSS: 1.1% chance of exploitation in the next 30 days; higher than 64% of CVEs (scores of 2026-10-31)
Published: 2017-12-25
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

apple:iphone_os
apple:tvos

References

http://www.securityfocus.com/bid/102182
http://www.securitytracker.com/id/1040008
https://support.apple.com/HT208357
https://support.apple.com/HT208359
https://www.engadget.com/2017/12/21/apple-ignored-a-major-homekit-security-flaw-for-six-weeks/

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