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CVE-2021-33596
Fake Apple login prompt in F-Secure SAFE browser for iOS
Low3.5EPSS 0.80%
- Published
- Updated
- Reserved
- Assigned by
- F-SecureUS
Description
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| F-SecureUSCNA (assigner) | 3.1 | Low3.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N |
| NVDNVD · Modified | 3.1 | Medium4.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:N/I:L/A:N |
- EPSS (exploitation in 30 days)
- 0.80% · top 43% of all CVEs (5 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Low 3.5.
Weakness
- Fake Apple login prompt in F-Secure SAFE browser for iOS
- CWE-1021 (opens in a new tab)All about CWE-1021 and its CVEs
Affected products
F-Secure · F-Secure Mobile Security
- affected 18.3x – < 18.4x
What to do
Solution: Upgrade to version 18.4.x or newer from the App Store
References (3)
- https://www.f-secure.com/en/business/programs/vulnerability-reward-program/hall-of-fame (opens in a new tab)x_refsource_MISCx_transferred
- https://www.f-secure.com/en/business/support-and-downloads/security-advisories (opens in a new tab)x_refsource_MISCx_transferred
- https://www.f-secure.com/en/business/support-and-downloads/security-advisories/cve-2021-33596 (opens in a new tab)x_refsource_MISCx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-33596)Record last updated .