Security readout for executives and security teams
Plain-English summary
CVE-2020-27907 is an Apple macOS memory corruption flaw. Apple says an application may execute arbitrary code with kernel privileges, meaning a compromised Mac could potentially be taken over at the operating-system core level. Apple fixed it in listed Big Sur, Catalina, and Mojave updates.
Executive priority
Treat as high priority for remaining legacy macOS fleets. Kernel privilege impact can mean full device compromise, but the bundle does not support claims of active exploitation. The immediate business task is patch verification and legacy asset cleanup.
Technical view
The issue is described as memory corruption addressed by improved memory handling. The disclosed impact is arbitrary code execution with kernel privileges from an application context. The bundle provides no CVSS, CWE, detailed component, or exploit mechanics, so validation should focus on macOS patch level.
Likely exposure
Exposure is most likely on macOS systems older than macOS Big Sur 11.1, Big Sur 11.0.1, Security Update 2020-001 Catalina, or Security Update 2020-007 Mojave. The affected version range is not specified beyond Apple macOS.
Exploitation context
The source bundle does not show CISA KEV listing or other evidence of active exploitation. The practical risk is elevated because successful exploitation could move from application execution to kernel privilege, but exploit availability is not evidenced here.
Researcher notes
Apple’s disclosure is terse: no CVSS, CWE, vulnerable component, or affected build range is provided in the bundle. The phrase “an application may” suggests local application context, but deeper prerequisites are not documented in the provided sources.
Mitigation direction
- Apply Apple’s fixed macOS releases or later supported updates.
- Prioritize unmanaged, legacy, and internet-facing user workstations.
- Confirm Catalina and Mojave hosts received the named Security Updates.
- Check Apple advisories for any later superseding guidance.
- Retire macOS versions that cannot receive current security updates.
Validation and detection
- Inventory macOS versions across endpoint management systems.
- Verify Big Sur hosts are at 11.1 or later.
- Verify Catalina hosts include Security Update 2020-001 or later.
- Verify Mojave hosts include Security Update 2020-007 or later.
- Flag systems outside supported patch management 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.
Execution behavior lookup
The CVE wording references code or command execution, so execution technique review may help defensive triage. This is a Glexia inferred lookup path, not an official MITRE, ATT&CK, or CVE Program mapping.
Open ATT&CK lookupCVE-2020-27907 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.