CVE-2021-27215

CRITICAL 9.8CVE-2021-27215 · Published 03/03/2021 · updated 17/06/2026

In short

CVE-2021-27215 is a CRITICAL (CVSS 9.8) vulnerability affecting genuagate (genua).
Chance of exploitation in the next 30 days (EPSS): 2.3%, higher than 83.8% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
genuagate genua	`= 10.1= 9.0= 9.6.0≥ 10.0, ≤ 10.1≤ 9.0`	No fix yet

Description

An issue was discovered in genua genugate before 9.0 Z p19, 9.1.x through 9.6.x before 9.6 p7, and 10.x before 10.1 p4. The Web Interfaces (Admin, Userweb, Sidechannel) can use different methods to perform the authentication of a user. A specific authentication method during login does not check the provided data (when a certain manipulation occurs) and returns OK for any authentication request. This allows an attacker to login to the admin panel as a user of his choice, e.g., the root user (with highest privileges) or even a non-existing user.

References

kunde.genua.de/en/overview/genugate.html · Patch
sec-consult.com/vulnerability-lab/advisory/authentication-bypass-genua-genugate · Exploit
genua.de/en/it-security-solutions/high-resistance-firewall-genugate · Product

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