Full Report
Apple security advisory (AV26-823)
Analysis Summary
# Vulnerability: Active Exploitation in macOS (AV26-823)
## CVE Details
- **CVE ID:** CVE-2026-65400
- **CVSS Score:** Not explicitly listed in advisory (Typically High/Critical for exploited macOS kernel or system-level flaws)
- **CWE:** Not specified (Awaiting specific vendor technical breakdown)
## Affected Systems
- **Products:** macOS Tahoe, macOS Sequoia, macOS Sonoma
- **Versions:**
- macOS Tahoe prior to 26.6.1
- macOS Sequoia prior to 15.7.9
- macOS Sonoma prior to 14.8.9
- **Configurations:** Default installations of the aforementioned operating systems.
## Vulnerability Description
While the specific technical root cause (e.g., buffer overflow, use-after-free, or logic error) is not detailed in the high-level Canadian Centre for Cyber Security advisory, CVE-2026-65400 represents a security flaw significant enough to bypass system protections. Historically, CVEs targeted in the wild against macOS often involve the Kernel, WebKit, or WindowServer components to achieve arbitrary code execution or privilege escalation.
## Exploitation
- **Status:** **Exploited in the wild.** Open-source reporting confirms active targeting of this vulnerability.
- **Complexity:** Not specified (Often Low to Medium for "in the wild" exploits)
- **Attack Vector:** Not specified (Commonly Network/Remote via browser or Local via malicious application)
## Impact
- **Confidentiality:** High (Potential for unauthorized data access)
- **Integrity:** High (Potential for unauthorized system modification)
- **Availability:** High (Potential for system crashes or instability)
## Remediation
### Patches
Apple has released the following security updates to address the vulnerability:
- **macOS Tahoe:** Upgrade to version **26.6.1** or later.
- **macOS Sequoia:** Upgrade to version **15.7.9** or later.
- **macOS Sonoma:** Upgrade to version **14.8.9** or later.
### Workarounds
No official workarounds have been provided. Immediate patching is the recommended course of action due to active exploitation.
## Detection
- **Indicators of Compromise:** Users should monitor for unusual system behavior, unexpected restarts, or unauthorized modifications to system files.
- **Detection methods and tools:**
- Verify macOS version via `About This Mac` or terminal command `sw_vers`.
- Use Mobile Device Management (MDM) queries to identify non-compliant (unpatched) assets across the fleet.
## References
- **Vendor advisories:**
- hxxps[://]support[.]apple[.]com/en-us/148170
- hxxps[://]support[.]apple[.]com/en-us/148171
- hxxps[://]support[.]apple[.]com/en-us/148172
- **General Release Info:**
- hxxps[://]support[.]apple[.]com/en-us/100100