Home/CVE/A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When user click on a special
CVE

CVE-2021-40834

A user interface overlay vulnerability was discovered in F-secure SAFE Browser for Android. When user click on a special

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.

MEDIUM · CVSS 4.3 EPSS 0.00205
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  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules1 YARA rules0
⬡

Weakness Classification

CWE-1021Improper Restriction of Rendered UI Layers or Frames
▤

Affected Products & Versions

1
f-secure safe<= 17.9
◈

Sigma Hunt Rules

1
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
producthighRegistry Persistence via Service in Safe Mode
▣

Scoring & Timeline

4.3
MEDIUM · CVSS v3.1 · cve-notifications-us@f-secure.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD10 Dec 2021 · 02:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:L
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
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-advisories/cve-2021-40834Vendor Advisory
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