CVE-2021-4226

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

RSFirewall tries to identify the original IP address by looking at different HTTP headers. A bypass is possible due to the way it is implemented.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-345

Affected software

VendorProductVersions
UnknownRSFirewall!< 1.1.25

References

Timeline

Published
Dec 15, 2022
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2021-4226: Critical severity, CVSS 9.8 | Vulnix