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TI-2021-17759 Aliases CVE-2021-40834GHSA-39jf-9gqp-rjmj

User interface Spoofing in F-Secure SAFE browser for Android

Priority LOW 21CWE-1021Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-1021.

Summary

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.

Why it matters now

EPSS 0.00751 55th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
F-SecureF-Secure Mobile Security18.5x and later—No fix listedCNA
  • F-Secure Mobile Security VendorF-Secure Affected 18.5x and later Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:f-secure:safe:*:*:*:*:*:android:*:*up to 17.9VulnerableF-Secure
  • cpe:2.3:a:f-secure:safe:*:*:*:*:*:android:*:* Versions up to 17.9 Vulnerable ·F-Secure

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-40834
  2. 2026-10-03 Alias added: GHSA-39jf-9gqp-rjmj

References

Advisory 2

  • TI-2021-20261 Universal Cross-Site Scripting Vulnerability in F-Secure SAFE Browser Protection for Android CVSS 3.1CRITICAL 9.6
  • TI-2020-11780 An issue was discovered in F-Secure SAFE 17.7 on macOS. CVSS 3.1HIGH 8.1
  • TI-2020-11779 An issue was discovered in F-Secure SAFE 17.7 on macOS. CVSS 3.1HIGH 8.1
  • TI-2022-11493 Address Bar Spoofing Vulnerability in F-Secure SAFE Browser for Android CVSS 3.1HIGH 8.8
  • TI-2019-08714 In the F-Secure installer in F-Secure SAFE for Windows before 17.6, F-Secure Internet… CVSS 3.0HIGH 7.8
  • TI-2022-17862 A vulnerability affecting F-Secure SAFE browser for Android and iOS was discovered. CVSS 3.1MEDIUM 6.5
See all 18 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences