CVE-2021-33594

Name: CVE-2021-33594
Creator: NVD / NIST
Published: 2021-08-11T11:15:09.067+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.5/10EPSS 1.07%

Last modified Jun 17, 2026

CVE-2021-33594 is a low-severity vulnerability rated 3.5/10 on the CVSS scale. An address bar spoofing vulnerability was discovered in Safe Browser for Android. When user clicks on a specially crafted a malicious URL, it appears like a legitimate one on the address bar, while the content comes from other domain and presented in a window, covering the original content. EPSS estimates a 1.07% chance of exploitation in the next 30 days.

Description

An address bar spoofing vulnerability was discovered in Safe Browser for Android. When user clicks on a specially crafted a malicious URL, it appears like a legitimate one on the address bar, while the content comes from other domain and presented in a window, covering the original content. A remote attacker can leverage this to perform address bar spoofing attack.

Metrics

CVSS 3.1

3.5/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

EPSS Probability

1.07%

60.7th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
F-Secure	Safe	< 18.4.0

References

https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameVendor Advisory
https://www.f-secure.com/en/business/support-and-downloads/security-advisoriesVendor Advisory
https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33594Vendor Advisory
https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fameVendor Advisory
https://www.f-secure.com/en/business/support-and-downloads/security-advisoriesVendor Advisory
https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33594Vendor Advisory

Timeline

Published: Aug 11, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-33594?

How severe is CVE-2021-33594?

CVE-2021-33594 has a CVSS score of 3.5/10 (LOW severity). The EPSS model estimates a 1.07% probability of exploitation in the next 30 days.

How do I fix CVE-2021-33594?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-33594?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST