High Severity Vulnerability
This vulnerability has been rated as High severity. Immediate action is recommended.
CVE-2021-47784
High
Low
Medium
High
Critical
7.5
CVSS Score
Published: Jan 15, 2026
Last Modified: Jan 15, 2026
Vulnerability Description
Cyberfox Web Browser 52.9.1 contains a denial of service vulnerability that allows attackers to crash the application by overflowing the search bar with excessive data. Attackers can generate a 9,000,000 byte payload and paste it into the search bar to trigger an application crash.
CVSS Metrics
Common Vulnerability Scoring System
Vector String:
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector
N
Attack Complexity
L
Privileges Required
N
User Interaction
N
Scope
U
Confidentiality
N
Integrity
N
Availability
H
Severity Details
7.5
out of 10.0
High
Key Information
- Published Date
- January 15, 2026
