CVE-2019-8662
This issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10...
This issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. An attacker may be able to trigger a use-after-free in an application deserializing an untrusted NSDictionary.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
NVD Score used
This issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. An attacker may be able to trigger a use-after-free in an application deserializing an untrusted NSDictionary.
- Record
CVE-2019-8662- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-416, CWE-502
- Updated
- 2026-11-02
CVE List No score
This issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. An attacker may be able to trigger a use-after-free in an application deserializing an untrusted NSDictionary.
- Record
CVE-2019-8662- Updated
- 2026-11-02
EUVDEUVD-2019-18052 No score
This issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. An attacker may be able to trigger a use-after-free in an application deserializing an untrusted NSDictionary.
- Record
EUVD-2019-18052- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-v448-6mjx-mr34 No score
This issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10...
This issue was addressed with improved checks. This issue is fixed in iOS 12.4, macOS Mojave 10.14.6, tvOS 12.4, watchOS 5.3. An attacker may be able to trigger a use-after-free in an application deserializing an untrusted NSDictionary.
- Record
GHSA-v448-6mjx-mr34- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Exploit-DB | macOS / iOS NSKeyedUnarchiver - Use-After-Free of ObjC Objects when Unarchiving OITSUIntDictionary Instances | 2019-07-30 |
| Exploit-DB | iMessage - Decoding NSSharedKeyDictionary can read ObjC Object at Attacker Controlled Address | 2019-11-11 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products | EUVD | |
| first indexed | CVE List, Exploit-DB, GitHub Advisories, NVD |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2019-8662 is a critical vulnerability (CVSS 9.8) in Apple Ios, published December 18, 2019. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 9.78%, the 95th percentile. No source names a fixed version.