CVE-2021-27215Public exploitNetwork attack vector

Unauthenticated root access via manipulated authentication method parameter

Published Mar 3, 2021 · Updated Aug 3, 2024

Authentication bypass in genua genugate allows remote attackers to access its web interfaces as arbitrary users, including root. A manipulated HTTP POST method parameter selects a login authentication method that does not validate supplied data and returns success for every request. Exploitation requires network access to the Admin, Sidechannel Web, or Userweb interface and grants the chosen account's privileges; certified deployments isolate the admin interface on a separate network.

CVSS severity9.8
Critical
EPSS probability2.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in genua genugate allows remote attackers to access its web interfaces as arbitrary users, including root. A manipulated HTTP POST method parameter selects a login authentication method that does not validate supplied data and returns success for every request. Exploitation requires network access to the Admin, Sidechannel Web, or Userweb interface and grants the chosen account's privileges; certified deployments isolate the admin interface on a separate network.

The record

CVE
CVE-2021-27215
Published
Mar 3, 2021
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-306, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 3, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-306Missing Authentication for Critical Function
T1190Exploit Public-Facing Application

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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