Security readout for executives and security teams
Plain-English summary
CVE-2020-27923 is an Apple image-processing flaw. A maliciously crafted image could trigger arbitrary code execution on affected Apple devices. Apple fixed it with improved input validation across macOS, iOS, iPadOS, watchOS, and tvOS releases.
Executive priority
Treat this as a high-priority Apple patch compliance issue, especially for unmanaged or internet-facing user devices. There is no provided evidence of active exploitation, but arbitrary code execution from image processing creates meaningful business risk.
Technical view
Apple describes an out-of-bounds write reachable during processing of a maliciously crafted image. The documented impact is arbitrary code execution. The source bundle does not provide CVSS, CWE, affected version ranges, exploit prerequisites beyond image processing, or component-level implementation details.
Likely exposure
Exposure is most likely on Apple endpoints, mobile devices, watches, Apple TVs, and Macs running versions older than the listed fixed releases. Exact vulnerable version ranges are not provided, so validation should compare fleet versions against Apple’s fixed versions.
Exploitation context
The provided sources do not show CISA KEV listing or active exploitation. The risk still matters because image files commonly arrive through email, messaging, browsers, and content workflows, but the bundle does not prove exploitation in the wild.
Researcher notes
The bundle is sparse: no CVSS, CWE, exploit maturity, vulnerable version ranges, or root-cause component details are provided. Do not assume exploitation status. Focus research on Apple advisory mapping, patch verification, and whether unsupported Apple OS versions remain in scope.
Mitigation direction
- Update iOS and iPadOS devices to 14.2 or later.
- Update watchOS devices to 7.1 or later.
- Update tvOS devices to 14.2 or later.
- Update macOS to Big Sur 11.1, 11.0.1, or applicable Catalina/Mojave security update.
- Check Apple advisories for platform-specific guidance and superseding updates.
- Prioritize devices that handle untrusted images or external communications.
Validation and detection
- Inventory Apple device OS versions through MDM or asset tooling.
- Confirm macOS Catalina has Security Update 2020-001 or later.
- Confirm macOS Mojave has Security Update 2020-007 or later.
- Confirm Big Sur systems are on 11.0.1, 11.1, or later.
- Review vulnerability scanner results for CVE-2020-27923 coverage.
- Document exceptions where devices cannot receive supported Apple updates.
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-2020-27923 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/HT211928CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT211929CVE reference · x_refsource_MISC
- https://support.apple.com/en-us/HT211930CVE 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.