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Vulnerability record · CVE-2017-2491 · published 27 June 2017

CVE-2017-2491: Apple iphone os use after free vulnerability

Apple · Iphone Os

Use after free vulnerability in the String.replace method JavaScriptCore in Apple Safari in iOS before 10.3 allows remote attackers to execute arbitrary code via a crafted web page, or a crafted file.

8.8 CVSS 3.0 High EPSS 8.0% · top 5.4% CWE-416 · Use after free
8.8CVSS 3.0 base score, v2 6.8
8.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

Use after free vulnerability in the String.replace method JavaScriptCore in Apple Safari in iOS before 10.3 allows remote attackers to execute arbitrary code via a crafted web page, or a crafted file.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/98316 Third Party AdvisoryVDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-17-321 Third Party AdvisoryVDB Entry
https://support.apple.com/en-us/HT207617 Vendor Advisory
https://www.exploit-db.com/exploits/41964/
http://www.securityfocus.com/bid/98316 Third Party AdvisoryVDB Entry
http://www.zerodayinitiative.com/advisories/ZDI-17-321 Third Party AdvisoryVDB Entry
https://support.apple.com/en-us/HT207617 Vendor Advisory
https://www.exploit-db.com/exploits/41964/

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2017-2491), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.