What’s Vulnerable › Vulnerabilities

CVE-2021-1751

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-02 · updated 2026-06-17

Description

A logic issue was addressed with improved state management. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave. Mounting a maliciously crafted Samba network share may lead to arbitrary code execution.

Affected products

• macOS: from 10.14 before 10.14.6; from 10.15 before 10.15.7; 10.14.6, 10.14.6-security_update_2019-004, 10.14.6-security_update_2019-005, 10.14.6-security_update_2019-006, 10.14.6-security_update_2019-007, 10.14.6-security_update_2020-001 (+10) — fixed in 10.14.6, 10.15.7
• Apple macOS: from 11.0 before 11.2 — fixed in 11.2

How to fix

Upgrade to a fixed version: macOS 10.14.6, 10.15.7; Apple macOS 11.2. Check the vendor advisory for mitigations.

References

• https://support.apple.com/en-us/HT212147
• https://support.apple.com/en-us/HT212147

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