CVE-2025-43521 Security feature bypass in macOS
An app can bypass code-signing restrictions to access sensitive user data on Intel-based Macs, requiring an OS upgrade.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2025-43521?
CVE-2025-43521 is a medium-severity vulnerability in Apple Macos, published on 12 Dec 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A downgrade issue affecting Intel-based Mac computers was addressed with additional code-signing restrictions. This issue is fixed in macOS Sequoia 15.7.3, macOS Tahoe 26.2. An app may be able to access sensitive user data.
Weakness: CWE-347
Which versions are affected by CVE-2025-43521?
It affects 1 product.
Products include Apple Macos.
How do I fix CVE-2025-43521?
No fix has been published for CVE-2025-43521 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-43521 being exploited?
There is no known exploitation of CVE-2025-43521 in the wild and no public exploit code.
Other vulnerabilities in Apple Macos
Sources
Also known as GHSA-cx5h-j8w3-whpr.