CVE-2021-1820
MEDIUM
6.5
CVSS Score
Published: September 8, 2021 at 02:54 PM UTC
Updated: June 17, 2026 at 03:32 AM UTC
5 products affected across 1 vendormacOSiPhone OSiPadOS
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Severity
MEDIUM6.5
Exploit prediction
EPSS 1%
Description
A memory initialization issue was addressed with improved memory handling. This issue is fixed in macOS Big Sur 11.3, iOS 14.5 and iPadOS 14.5, watchOS 7.4, tvOS 14.5. Processing maliciously crafted web content may result in the disclosure of process memory.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
v < 14.5
Affected range stops below 14.5, so it looks safe — our inference, not a vendor statement
v < 14.5
Affected range stops below 14.5, so it looks safe — our inference, not a vendor statement
v < 11.311.0 ≤ v < 11.3
Affected range stops below 11.3, so it looks safe — our inference, not a vendor statement
v < 14.5
Affected range stops below 14.5, so it looks safe — our inference, not a vendor statement
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (4)
CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- REQUIRED
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- NONE
Vector?
Quick Info
StatusMODIFIED
CWE
CWE-665
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