{"cve":"CVE-2017-13821","nvd":{"published":"2017-11-13T03:29:01.677","modified":"2026-06-17T01:05:14.207","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","score":5.5},"cwes":["CWE-200"],"references":["http://www.securitytracker.com/id/1039710","https://support.apple.com/HT208221","http://www.securitytracker.com/id/1039710","https://support.apple.com/HT208221"],"products":["apple:mac_os_x"],"source":"nvd","synced_at":"2026-10-19T20:47:01.408438353+00:00"},"epss":{"cve":"CVE-2017-13821","score":0.00871,"percentile":0.58859,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}