What’s Vulnerable › Vulnerabilities

CVE-2021-30961

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-08-24 · updated 2026-06-17
• Weakness: CWE-120

Description

A buffer overflow issue was addressed with improved memory handling. This issue is fixed in Security Update 2021-008 Catalina, macOS Big Sur 11.6.2. Parsing a maliciously crafted audio file may lead to disclosure of user information.

Affected products

• macOS: from 10.15 through 10.15.7; 10.15.7-security_update_2020-001, 10.15.7-security_update_2021-001, 10.15.7-security_update_2021-002, 10.15.7-security_update_2021-003, 10.15.7-security_update_2021-004, 10.15.7-security_update_2021-005 (+2)
• Apple macOS: from 11.0 before 11.6.2 — fixed in 11.6.2

How to fix

Upgrade to a fixed version: Apple macOS 11.6.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212979
• https://support.apple.com/en-us/HT212981
• https://support.apple.com/en-us/HT212979
• https://support.apple.com/en-us/HT212981

Get alerted when CVE-2021-30961 or the next vulnerability affects your stack