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TI-2021-20263 Aliases CVE-2021-44751GHSA-7gxq-69xx-2vr4

F-Secure SAFE Browser vulnerable to USSD attacks

Priority LOW 25CWE-276Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
None · Low · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

A vulnerability affecting F-Secure SAFE browser was discovered. A maliciously crafted website attached with USSD code in JavaScript or iFrame can trigger dialer application from F-Secure browser which can be exploited by an attacker to send unwanted USSD messages or perform unwanted calls. In most modern Android OS, dialer application will require user interaction, however, some older Android OS may not need user interaction.

Why it matters now

EPSS 0.00575 47th percentileScored 2026-11-07
Fix Fixed F-Secure SAFE Browser for Android Version 18.5 & below (F-Secure): 18.6

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
F-SecureF-Secure SAFE Browser for Android Version 18.5 & below18.5 to before 18.618.6Patch availableCNA
  • F-Secure SAFE Browser for Android Version 18.5 & below VendorF-Secure Affected 18.5 to before 18.6 Fixed in 18.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:f-secure:safe:*:*:*:*:*:android:*:*before 18.5VulnerableF-Secure
  • cpe:2.3:a:f-secure:safe:*:*:*:*:*:android:*:* Versions before 18.5 Vulnerable ·F-Secure

Remediation

  • Fix · CNA F-Secure SAFE Browser for Android Version 18.5 & below (F-Secure) Fixed in 18.6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-44751
  2. 2026-10-03 Alias added: GHSA-7gxq-69xx-2vr4

References

Other 1

  • 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