What’s Vulnerable › Vulnerabilities

CVE-2021-47784: Cyberfox Web Browser 52.9.1 - Denial of Service (PoC)

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-15 · updated 2026-06-17
• Weakness: CWE-770

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.

Affected products

• Cyberfox Web Browser: 52.9.1 (Possibly all versions)

References

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

Get alerted when CVE-2021-47784 or the next vulnerability affects your stack