Security readout for executives and security teams
Plain-English summary
This Apple iOS and iPadOS issue could let a maliciously crafted font disclose process memory. Apple fixed it in iOS 14.0 and iPadOS 14.0. The public sources do not provide CVSS, broad impact detail, or evidence of active exploitation.
Executive priority
Treat this as a hygiene and device-compliance priority, not an emergency based on available evidence. Ensure mobile fleets meet the fixed Apple release level, especially for executives and sensitive users.
Technical view
CVE-2020-29639 is an out-of-bounds read in Apple font processing. Apple says improved input validation fixed the issue. Successful triggering requires processing a maliciously crafted font and may disclose process memory.
Likely exposure
Organizations are most likely exposed through iOS or iPadOS devices running versions older than 14.0. The sources do not specify exact affected version ranges or device models.
Exploitation context
No CISA KEV listing or cited source indicates active exploitation. Public information only states the condition: processing a maliciously crafted font may disclose process memory.
Researcher notes
The public record is sparse: no CVSS, CWE, exploit indicators, or detailed affected-version matrix are provided in the bundle. Analysis should stay anchored to Apple’s stated font-processing memory disclosure and fixed release.
Mitigation direction
- Update iOS and iPadOS devices to 14.0 or later.
- Check Apple advisory HT211850 for vendor guidance and affected-platform context.
- Use MDM inventory to identify devices below the fixed version.
- Retire or isolate devices that cannot receive the fixed release.
Validation and detection
- Confirm managed devices report iOS or iPadOS 14.0 or later.
- Sample high-risk devices manually to verify installed OS version.
- Review mobile device compliance rules for minimum OS enforcement.
- Document any legacy devices that remain below the fixed version.
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-2020-29639 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/HT211850CVE 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.