Security readout for executives and security teams
Plain-English summary
CVE-2020-27946 is an Apple information disclosure issue. If an affected device processes a maliciously crafted font, process memory could be exposed. Apple fixed it across iOS, iPadOS, macOS, tvOS, and watchOS security releases in December 2020.
Executive priority
Treat this as a patch-compliance item across Apple endpoints. There is no sourced active exploitation, but memory disclosure bugs can expose sensitive data and should not remain unaddressed on managed devices.
Technical view
The CVE describes a state management flaw in Apple font processing that may disclose process memory when handling a maliciously crafted font. The sources do not provide CVSS, CWE, vulnerable version ranges, or deeper root-cause details.
Likely exposure
Exposure is likely limited to Apple devices running versions before iOS 14.3, iPadOS 14.3, tvOS 14.3, watchOS 7.2, macOS Big Sur 11.1, or the named Catalina and Mojave security updates.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not marked KEV. The described trigger is processing a maliciously crafted font, but no public exploitation details are included in the bundle.
Researcher notes
Public detail is sparse. Apple attributes remediation to improved state management and lists affected OS release lines, but the bundle lacks CVSS, CWE, exploit maturity, crash indicators, or component-level technical detail.
Mitigation direction
- Update iOS and iPadOS devices to 14.3 or later.
- Update tvOS devices to 14.3 or later.
- Update watchOS devices to 7.2 or later.
- Apply macOS Big Sur 11.1 or the named Catalina/Mojave security update.
- Check Apple guidance for any product-specific update constraints.
Validation and detection
- Inventory Apple devices by OS family and version.
- Confirm each device meets the fixed Apple release level.
- Verify Catalina and Mojave hosts have the named security updates installed.
- Identify workflows that process untrusted fonts before patch completion.
- Track unsupported or unpatchable devices as residual risk.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CVE-2020-27946 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://support.apple.com/en-us/HT212011CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212003CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212005CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212009CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.