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TI-2021-12979 Aliases CVE-2021-33596GHSA-p3hp-p5r4-h3gq

Fake Apple login prompt in F-Secure SAFE browser for iOS

Priority LOW 21CWE-1021Published · Updated

Key facts

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

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

Summary

Showing the legitimate URL in the address bar while loading the content from other domain. This makes the user believe that the content is served by a legit domain. Exploiting the vulnerability requires the user to click on a specially crafted, seemingly legitimate URL containing an embedded malicious redirect while using F-Secure Safe Browser for iOS.

Why it matters now

EPSS 0.00797 56th percentileScored 2026-11-07
Fix Fixed F-Secure Mobile Security (F-Secure): 18.4x

SSVC decision points

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

Affected products

VendorProductAffected versionsFixed inStatusSource
F-SecureF-Secure Mobile Security18.3x to before 18.4x18.4xPatch availableCNA
  • F-Secure Mobile Security VendorF-Secure Affected 18.3x to before 18.4x Fixed in 18.4x Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:f-secure:safe:*:*:*:*:*:iphone_os:*:*before 18.4.272901VulnerableF-Secure
  • cpe:2.3:a:f-secure:safe:*:*:*:*:*:iphone_os:*:* Versions before 18.4.272901 Vulnerable ·F-Secure

Remediation

  • Fix · CNA F-Secure Mobile Security (F-Secure) Fixed in 18.4x

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-33596
  2. 2026-10-03 Alias added: GHSA-p3hp-p5r4-h3gq

References

Advisory 3

  • 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