What is CVE-2017-2391?

CVE-2017-2391 is a medium-severity vulnerability in Apple Keynote, classified under Inadequate Encryption Strength. CVSS score: 5.3/10. Published 2017-04-02.

How severe is CVE-2017-2391?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Apple Keynote

CVE-2017-2391

An issue was discovered in certain Apple products. Pages before 6.1, Numbers before 4.1, and Keynote before 7.1 on macOS and Pages before 3.1, Numbers before 3.1, and Keynote before 3.1 on iOS are affected. The issue involves the "Export" component. It allows users to bypass iWork PDF password protection by leveraging use of 40-bit RC4.

Published 2017-04-02 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.010 (60.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-326 — Inadequate Encryption Strength

References

www.securitytracker.com/id/1038135 (vdb-entry)
www.securitytracker.com/id/1038134 (vdb-entry)
support.apple.com/HT207595 (Vendor Advisory)
www.securitytracker.com/id/1038136 (vdb-entry)
www.securityfocus.com/bid/97126 (VDB Entry, Third Party Advisory, vdb-entry)

Frequently asked questions

What is CVE-2017-2391?: CVE-2017-2391 is a medium-severity vulnerability in Apple Keynote, classified under Inadequate Encryption Strength. CVSS score: 5.3/10. Published 2017-04-02.
How severe is CVE-2017-2391?: Medium severity. CVSS v3 base score is 5.3 out of 10.