CVE-2021-47784

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.

Score

CVSS 3.1 7.5 High

Status

Deferred - disclosure@vulncheck.com

Published

2026-01-15

Last modified

2026-01-15

Weaknesses

CWE-770

Affected products

• Cyberfox Web Browser (Cyberfox)

References

• https://web.archive.org/web/20180906035057/https://cyberfox.8pecxstudios.com/
• https://www.exploit-db.com/exploits/50336