A use after free issue was addressed with improved memory management. This issue is fixed in iOS 13.6 and iPadOS 13.6, tvOS 13.4.8, watchOS 6.2.8, iCloud for Windows 7.20, macOS Catalina 10.15.6, Security Update 2020-004 Mojave, Security Update 2020-004 High Sierra. Processing maliciously crafted XML may lead to an unexpected application termination or arbitrary code execution.
CVSS v4.0 Metrics
Exploitability
Attack VectorLocal
ComplexityLow
RequirementsPresent
PrivilegesNone
User InteractionActive
Threat
Exploit MaturityUnreported
Vulnerable System
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
Subsequent System
ConfidentialityNone
IntegrityNone
AvailabilityNone
Supplemental
SafetyNegligible
AutomatableYes
RecoveryAutomatic
Value DensityConcentrated
UrgencyMedium
Change Log
| Date | Source | Changes | Score |
|---|
| 2026-07-21 | nvd | AV: P→L, AC: H→L, PR: H→N, VC: N→H, VI: N→H, VA: N→H | 0.0 → 4.0 |
| 2026-07-21 | cve.org | initial, patch: Unavailable | 0.0 |
Affected Software
| Vendor | Product | Version |
|---|
| apple | icloud | < 7.20 |
| Apple | iOS and iPadOS | < 13.6 |
| apple | ipados | < 13.6 |
| apple | iphone_os | < 13.6 |
| apple | mac_os_x | ≥ 10.15, ≤ 10.15.6 |
| apple | mac_os_x | < 10.13.6 |
| apple | mac_os_x | ≥ 10.14, < 10.14.6 |
| apple | mac_os_x | 10.13.6 |
| apple | mac_os_x | 10.14.6 |
| Apple | macOS | < 10.15 |
| Apple | macOS | < 6.2 |
| Apple | macOS | < 7.20 |
| Apple | macOS | < 13.4 |
| apple | tvos | < 13.4.8 |
| apple | watchos | < 6.2.8 |
Published: 2021-04-02
