What is CVE-2017-2403?

CVE-2017-2403 is a high-severity vulnerability in Apple Mac OS X, classified under Use of Externally-Controlled Format String. CVSS score: 8.8/10. Published 2017-04-02.

How severe is CVE-2017-2403?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Apple Mac OS X

CVE-2017-2403

An issue was discovered in certain Apple products. macOS before 10.12.4 is affected. The issue involves the "Printing" component. A format-string vulnerability allows remote attackers to execute arbitrary code via a crafted ipp: or ipps: URL.

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

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.027 (85.6th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 85.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.027 · newest: 0.027 · change: 0.000

Affected products

Apple Mac OS X

Weakness classification (CWE)

CWE-134 — Use of Externally-Controlled Format String

References

www.securityfocus.com/bid/97140 (VDB Entry, Third Party Advisory, vdb-entry)
support.apple.com/HT207615 (Vendor Advisory)
www.securitytracker.com/id/1038138 (vdb-entry)

Frequently asked questions

What is CVE-2017-2403?: CVE-2017-2403 is a high-severity vulnerability in Apple Mac OS X, classified under Use of Externally-Controlled Format String. CVSS score: 8.8/10. Published 2017-04-02.
How severe is CVE-2017-2403?: High severity. CVSS v3 base score is 8.8 out of 10.