Security readout for executives and security teams
Plain-English summary
CVE-2021-30920 is a macOS permissions flaw that could let a local attacker read sensitive information. Apple states the issue was fixed with improved validation in macOS Monterey 12.0.1. The public source bundle does not specify CVSS, affected macOS versions, or active exploitation.
Executive priority
Treat this as a patch-compliance and endpoint hygiene issue, not an internet-facing emergency based on available evidence. Prioritize confirming whether macOS systems are updated, especially devices used by privileged staff or in shared environments.
Technical view
The CVE describes a permissions issue in Apple macOS that allowed local information disclosure. Apple’s advisory says improved validation addressed the flaw and identifies macOS Monterey 12.0.1 as the fixed release. No CWE, CVSS vector, vulnerable component, or affected version range is provided in the supplied sources.
Likely exposure
Exposure is limited to macOS systems affected by Apple’s advisory and not updated with the Monterey 12.0.1 fix. The bundle does not identify exact vulnerable versions, so fleet exposure requires matching endpoint OS versions against Apple guidance.
Exploitation context
The CVE states a local attacker may read sensitive information. The supplied sources do not show CISA KEV listing or active exploitation. Risk is more relevant where attackers already have local access, valid accounts, or footholds on macOS endpoints.
Researcher notes
Evidence is sparse. The sources identify local information disclosure and the fixed release, but not the vulnerable component, affected version range, exploit primitives, or severity scoring. Avoid asserting exploitation or detailed impact beyond sensitive information disclosure.
Mitigation direction
- Update eligible Macs to macOS Monterey 12.0.1 or vendor-supported later releases.
- Check Apple’s advisory for applicability across unsupported or differently-versioned macOS fleets.
- Prioritize high-value, shared, developer, and administrator Macs for remediation review.
- Maintain least-privilege controls to reduce the impact of local access.
Validation and detection
- Inventory macOS versions across managed endpoints.
- Confirm whether each Mac has received the Monterey 12.0.1 security content or later applicable updates.
- Review vulnerability scanner findings against Apple’s advisory, not only CVSS severity.
- Check endpoint management reports for unmanaged or stale macOS devices.
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-2021-30920 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/HT212869CVE 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.