Security readout for executives and security teams
Plain-English summary
CVE-2021-30907 is an Apple operating system flaw where a malicious app may gain higher privileges. Apple says the issue was an integer overflow fixed through improved input validation. The business concern is managed Apple devices that have not received the listed 2021 security updates.
Executive priority
Treat this as a patch-compliance priority for Apple fleets, especially executive, developer, and mobile workforces. It is not supported as actively exploited by the supplied sources, but privilege escalation can worsen the impact of malicious app execution.
Technical view
The source describes an integer overflow leading to possible privilege elevation by a malicious application. Apple fixed it across iOS, iPadOS, macOS, tvOS, and watchOS releases. No CVSS score, CWE, component name, or technical root-cause detail is provided in the supplied sources.
Likely exposure
Exposure is likely on Apple endpoints, phones, tablets, TVs, and watches running versions older than the fixed releases named by Apple. The bundle does not provide exact vulnerable version ranges beyond unspecified affected Apple products.
Exploitation context
The sources do not report active exploitation, and the CVE is not marked KEV. The stated scenario requires a malicious application able to run on the target, making this most relevant after app installation, device compromise, or weak application control.
Researcher notes
The public record is sparse: no CVSS, CWE, affected component, proof of concept, or precise vulnerable build range is supplied. Research should focus on confirming patch levels and correlating Apple advisory entries rather than assuming exploitability details.
Mitigation direction
- Update iOS and iPadOS to 15.1 or 14.8.1 where applicable.
- Update macOS to Monterey 12.0.1, Big Sur 11.6.1, or Catalina Security Update 2021-007.
- Update tvOS to 15.1 and watchOS to 8.1 where applicable.
- Check Apple advisories for device-specific update availability and deployment exceptions.
- Restrict untrusted application installation on managed Apple devices.
Validation and detection
- Inventory Apple devices by OS family and version.
- Confirm devices meet or exceed Apple’s listed fixed releases.
- Review MDM compliance reports for outdated or unmanaged devices.
- Check for unsupported devices that cannot receive the fixed updates.
- Validate application control policies for high-risk user groups.
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-2021-30907 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
- https://support.apple.com/en-us/HT212871CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212872CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212867CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212868CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212874CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT212876CVE 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.