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CVE-2021-40834

4.3 · MEDIUM

A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android.

Published Dec 10, 2021CWE-1021EPSS 0.75%

Overview

CVE-2021-40834 is a medium-severity vulnerability. It was published on December 10, 2021 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When user click on a specially crafted seemingly legitimate URL SAFE browser goes into full screen and hides the user interface. A remote attacker can leverage this to perform spoofing attack.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refwww.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameRefwww.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40834Refwww.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameRefwww.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-40834

How CyberStrike helps

Frequently asked questions

What is CVE-2021-40834?

CVE-2021-40834 is a medium-severity vulnerability. It was published on December 10, 2021 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2021-40834?

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2021-40834?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2021-40834?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2021-40834 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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