CVE-2026-54123: Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability
Exposure of sensitive information to an unauthorized actor in Microsoft Defender for Endpoint allows an authorized attacker to disclose information locally.
Other sources
Microsoft Defender for Endpoint for Mac Information Disclosure Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 101.26042.0020
Event History
Frequently Asked Questions
What is the severity of CVE-2026-54123?
The severity of CVE-2026-54123 is rated as medium with a score of 5.5.
How do I fix CVE-2026-54123?
To mitigate CVE-2026-54123, update Microsoft Defender for Endpoint for Mac to the latest version.
What type of vulnerability is CVE-2026-54123?
CVE-2026-54123 is classified as an information disclosure vulnerability.
Who is affected by CVE-2026-54123?
Users of Microsoft Defender for Endpoint for Mac are affected by CVE-2026-54123.
What can an attacker do with CVE-2026-54123?
An authorized attacker can exploit CVE-2026-54123 to disclose sensitive information locally.