Full Report
Apple has released security updates to fix a zero-day vulnerability that was exploited in an "extremely sophisticated attack" targeting specific individuals. [...]
Analysis Summary
# Vulnerability: Arbitrary Code Execution in Apple dyld
## CVE Details
- CVE ID: CVE-2026-20700
- CVSS Score: Not explicitly provided, but associated with high-severity exploitation. (Implied High)
- CWE: Not explicitly provided, but related to memory write capabilities within the dynamic linker, suggesting possible CWE-121 (Buffer Copy without Checking Size of Input) or similar memory corruption issues leading to RCE.
## Affected Systems
- Products: iOS, iPadOS, macOS, tvOS, watchOS, visionOS (specifically the `dyld` component).
- Versions: Versions of iOS prior to iOS 18.7.5. Affected hardware includes iPhone 11 and later, various models of iPad (Pro, Air, standard, mini 5th gen and later), and devices running macOS Tahoe.
- Configurations: No specific configuration details provided other than being on vulnerable OS versions.
## Vulnerability Description
The vulnerability is an arbitrary code execution flaw residing in `dyld`, Apple's Dynamic Link Editor. An attacker who gains memory write capability on the affected device may be able to execute arbitrary code remotely. This flaw was discovered by Google's Threat Analysis Group.
## Exploitation
- Status: Exploited in the wild (Targeted attacks reported).
- Complexity: High/Extremely Sophisticated (Implied by the nature of the attack targeting specific individuals).
- Attack Vector: Not explicitly detailed, but RCE often implies network or remote access capability, especially when targeting specific individuals without user interaction.
## Impact
- Confidentiality: High (Arbitrary code execution capability generally implies full compromise).
- Integrity: High (Arbitrary code execution capability generally implies full compromise).
- Availability: High (Arbitrary code execution capability generally implies full compromise).
## Remediation
### Patches
- iOS: Upgrade to iOS 18.7.5
- iPadOS: Upgrade to iPadOS 18.7.5
- macOS: Upgrade to macOS Tahoe 26.3
- tvOS: Upgrade to tvOS 26.3
- watchOS: Upgrade to watchOS 26.3
- visionOS: Upgrade to visionOS 26.3
### Workarounds
- No specific workarounds were documented in the provided context; immediate patching is advised.
## Detection
- Indicators of Compromise (IOCs): Not provided in detail. However, the advisory mentions that exploitation was likely coupled with CVE-2025-14174 and CVE-2025-43529 in the same incidents. Monitoring for activity related to these previously disclosed CVEs might offer tangential insight.
- Detection methods and tools: Not specified in the article. Users should rely on vendor security updates.
## References
- Vendor Advisories: [support.apple.com/en-us/126347] (URL defanged)
- Previous Related Advisories: Articles referencing fixes for CVE-2025-14174 and CVE-2025-43529 (Fixed in December).