CVE-2021-30755 Information disclosure in macOS

What is CVE-2021-30755?

CVE-2021-30755 is a medium-severity vulnerability in Apple Macos, published on 8 Sep 2021. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Processing a maliciously crafted font may result in the disclosure of process memory. This issue is fixed in macOS Big Sur 11.4, tvOS 14.6, watchOS 7.5. An out-of-bounds read was addressed with improved input validation.

Weakness: CWE-125

Which versions are affected by CVE-2021-30755?

It affects 3 products.

Products include Apple Macos, Apple Tvos, Apple Watchos.

How do I fix CVE-2021-30755?

No fix has been published for CVE-2021-30755 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-30755 being exploited?

There is no known exploitation of CVE-2021-30755 in the wild and no public exploit code.

Other vulnerabilities in Apple Macos

• CVE-2026-65400 Apple macOS Improper Authentication Exploited Critical 9.8
• CVE-2024-44146 Security feature bypass in macOS Critical 10.0
• CVE-2024-44148 Security feature bypass in macOS Critical 10.0
• CVE-2023-38586 Security feature bypass in macOS Critical 10.0
• CVE-2023-40455 Security feature bypass in macOS Critical 10.0

All Apple Macos vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-gwjf-hjm7-xvq3.