Security readout for executives and security teams
Plain-English summary
Apple fixed a memory safety bug that could let someone with local access gain higher privileges. It affects Apple operating systems listed in the advisory. The main business issue is outdated Apple devices, not remote internet exposure.
Executive priority
Treat as a normal priority endpoint patching item unless you have high-risk shared devices, weak device management, or many outdated Apple assets. No source-provided evidence supports emergency response.
Technical view
CVE-2020-27899 is a use-after-free vulnerability addressed with improved memory management. Apple states a local attacker may be able to elevate privileges. Fixed releases are iOS/iPadOS 14.2, macOS Big Sur 11.0.1, watchOS 7.1, and tvOS 14.2.
Likely exposure
Exposure is likely limited to Apple devices running versions before the fixed releases named by Apple. The source bundle does not identify affected build ranges, components, or whether older unsupported branches were affected.
Exploitation context
The provided sources do not show active exploitation, public exploit availability, or CISA KEV listing. Exploitation requires local attacker capability according to Apple, which lowers urgency compared with remote code execution but still matters on shared or compromised endpoints.
Researcher notes
The public description is sparse: no component name, CVSS, CWE, vulnerable version bounds, or technical root-cause detail beyond use-after-free. Avoid assuming exploitability details beyond local privilege escalation.
Mitigation direction
- Update Apple devices to the fixed versions or later.
- Prioritize managed macOS, iOS, iPadOS, watchOS, and tvOS assets.
- Check Apple guidance for any older branch or unsupported-device considerations.
- Use MDM compliance rules to block outdated devices where feasible.
Validation and detection
- Inventory Apple OS versions across managed and unmanaged assets.
- Confirm iOS and iPadOS devices are on 14.2 or later.
- Confirm macOS Big Sur systems are on 11.0.1 or later.
- Confirm watchOS 7.1 and tvOS 14.2 or later where applicable.
- Review vendor advisories for exact platform coverage.
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
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CVE-2020-27899 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
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/HT211931CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT211928CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT211929CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT211930CVE 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.