CVE-2019-8663

MEDIUMNVD 5.35.3—Weaponized

5.3

This issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6. A remote attacker may be able to leak memory.

CVSS v3: 5.3
EG Score: 5.3(medium)
EPSS: 84.9%
KEV: Not listed

Published

December 18, 2019

Last Modified

November 21, 2024

References (4)

product-security@applehttps://support.apple.com/HT210346
product-security@applehttps://support.apple.com/HT210348
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/HT210346
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/HT210348

Data Freshness Timeline

(refreshed 11× in last 7d / 20× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-08 14:15 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-07 15:23 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-06 13:45 UTCEPSS rescore
2026-06-05 22:45 UTCEPSS rescore
2026-06-05 06:08 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-04 13:10 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-02 20:11 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-06-01 13:50 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 22:29 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-31 00:14 UTCEPSS rescore
2026-05-29 13:42 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 Exploit-DB entry). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

Exploit-DBEDB-47257✓ verified
First seen Aug 15, 2019
NSKeyedUnarchiver - Info Leak in Decoding SGBigUTF8String
Open source ↗

Frequently asked(5)

What is CVE-2019-8663?

CVE-2019-8663 is a medium vulnerability published on December 18, 2019. This issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6. A remote attacker may be able to leak memory.

When was CVE-2019-8663 disclosed?

CVE-2019-8663 was first published in the National Vulnerability Database on December 18, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-8663 actively exploited?

CVE-2019-8663 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 84.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-8663?

CVE-2019-8663 has a CVSS v3 base score of 5.3 (NVD).

How do I remediate CVE-2019-8663?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-8663, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2019-8663

📅 Published

🔄 Last Modified

🔗 References (4)