Security readout for executives and security teams
Plain-English summary
CVE-2020-27901 is a macOS sandbox restriction bypass. Apple says a sandboxed process may circumvent sandbox restrictions. For executives, this is endpoint risk: a malicious or compromised app could potentially escape intended isolation. Apple fixed it in Big Sur and 2020 Catalina/Mojave security updates.
Executive priority
Treat this as a routine but important endpoint patching item. It does not have confirmed active exploitation in the provided evidence, but sandbox bypasses can weaken defense-in-depth if attackers already execute code on a Mac.
Technical view
Apple describes a logic issue addressed with improved restrictions. Fixed releases include macOS Big Sur 11.0.1 and 11.1, Security Update 2020-001 Catalina, and Security Update 2020-007 Mojave. The source bundle does not provide CVSS, CWE, prerequisites, or detailed impact scope.
Likely exposure
Exposure is most likely on Macs that have not installed the named Apple fixed releases or later equivalent updates. The sources identify Apple macOS but do not enumerate exact vulnerable version ranges beyond the fixed releases.
Exploitation context
The provided sources do not state active exploitation, and the CVE is not marked as KEV in the bundle. No exploit details or public exploitation evidence were provided, so exploitation status should be treated as unconfirmed.
Researcher notes
Public detail is limited to Apple’s description of a logic issue and sandbox restriction circumvention. The bundle lacks CVSS, CWE, affected version ranges, exploitation prerequisites, and proof-of-concept context. Validation should focus on update state, not exploit reproduction.
Mitigation direction
- Update macOS to the relevant Apple fixed release or later supported version.
- Install Security Update 2020-001 on Catalina systems where applicable.
- Install Security Update 2020-007 on Mojave systems where applicable.
- Check Apple advisories for any environment-specific update guidance.
- Prioritize managed endpoints that run untrusted or third-party applications.
Validation and detection
- Inventory macOS versions across managed and unmanaged endpoint fleets.
- Confirm installation of the relevant Apple security update or later release.
- Review MDM patch compliance reports for Catalina, Mojave, and Big Sur systems.
- Identify Macs running unsupported or unpatched macOS versions.
- Document exceptions and track remediation through endpoint management tooling.
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-2020-27901 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/HT212011CVE 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.