medium
6.5
Advisory Published
CVE Published
Updated

CVE-2021-30721

First published: Mon May 24 2021(Updated: )

A path handling issue was addressed with improved validation. This issue is fixed in macOS Big Sur 11.4, Security Update 2021-003 Catalina, Security Update 2021-004 Mojave. An attacker in a privileged network position may be able to leak sensitive user information.

Credit: Aleksandar Nikolic Cisco TalosAleksandar Nikolic Cisco Talos product-security@apple.com Aleksandar Nikolic Cisco Talos

Affected SoftwareAffected VersionHow to fix
Apple Mojave
Apple Catalina
Apple macOS<11.4
11.4
macOS Yosemite>=10.14.0<=10.14.5
macOS Yosemite>=10.15<=10.15.6
macOS Yosemite=10.14.6
macOS Yosemite=10.14.6-security_update_2019-001
macOS Yosemite=10.14.6-security_update_2019-002
macOS Yosemite=10.14.6-security_update_2019-004
macOS Yosemite=10.14.6-security_update_2019-005
macOS Yosemite=10.14.6-security_update_2019-006
macOS Yosemite=10.14.6-security_update_2019-007
macOS Yosemite=10.14.6-security_update_2020-001
macOS Yosemite=10.14.6-security_update_2020-002
macOS Yosemite=10.14.6-security_update_2020-003
macOS Yosemite=10.14.6-security_update_2020-004
macOS Yosemite=10.14.6-security_update_2020-005
macOS Yosemite=10.14.6-security_update_2020-006
macOS Yosemite=10.14.6-security_update_2020-007
macOS Yosemite=10.14.6-security_update_2021-001
macOS Yosemite=10.14.6-security_update_2021-002
macOS Yosemite=10.14.6-security_update_2021-003
macOS Yosemite=10.14.6-supplemental_update
macOS Yosemite=10.14.6-supplemental_update_2
macOS Yosemite=10.15.7
macOS Yosemite=10.15.7-security_update_2020
macOS Yosemite=10.15.7-security_update_2020-001
macOS Yosemite=10.15.7-security_update_2020-005
macOS Yosemite=10.15.7-security_update_2020-007
macOS Yosemite=10.15.7-security_update_2021-001
macOS Yosemite=10.15.7-security_update_2021-002
macOS Yosemite=10.15.7-supplemental_update
Apple macOS>=11.0.1<11.4

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Peer vulnerabilities

(Found alongside the following vulnerabilities)

Frequently Asked Questions

  • What is CVE-2021-30721?

    CVE-2021-30721 is a vulnerability in smb and it is a path handling issue that was addressed with improved validation.

  • What is the severity of CVE-2021-30721?

    The severity of CVE-2021-30721 is not mentioned in the available information.

  • How does CVE-2021-30721 affect macOS Big Sur?

    CVE-2021-30721 affects macOS Big Sur version 11.4.

  • How does CVE-2021-30721 affect macOS Mojave?

    There is no specific mention of how CVE-2021-30721 affects macOS Mojave in the available information.

  • How does CVE-2021-30721 affect macOS Catalina?

    There is no specific mention of how CVE-2021-30721 affects macOS Catalina in the available information.

  • How can I fix CVE-2021-30721?

    To fix CVE-2021-30721, update your macOS Big Sur to version 11.4.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2025 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203