CVE-2021-27215: 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

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CRITICAL 9.8REMOTEUPGRADE

CVE-2021-27215 is a critical-severity flaw (CVSS 9.8) affecting genuagate. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

Critical severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	2.3% (top 16%)
CISA exploited list	No
Weakness	CWE-306
Published	2021-03-03
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: genua

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-03-03 16:15 UTCPublished CVE record published
2026-06-17 03:44 UTCUpdated Record last modified

genua genuagate UPGRADE

Affected: <= 9.0 · >= 10.0 and <= 10.1 · 9.0 · 9.0 p1 · 9.0 p10 · 9.0 p11 · 9.0 p12 · 9.0 p13

Fixed in: newer than 10.1

Safe to downgrade to: a release before 9.0

1. Check installed version

apt-cache policy genuagate || rpm -q genuagate || genuagate --version

2. UPGRADE to newer than 10.1 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade genuagate

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade genuagate

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 9.0 (Debian / Ubuntu)

apt-cache madison genuagate sudo apt install genuagate=<VERSION_BEFORE_9.0> sudo apt-mark hold genuagate

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list genuagate sudo dnf downgrade genuagate-<VERSION_BEFORE_9.0> sudo dnf versionlock add genuagate

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2021-27215?

genuagate: upgrade to newer than 10.1. Exact commands for each OS are on this page.

Is CVE-2021-27215 being exploited?

CVE-2021-27215 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2021-27215 affect?

CVE-2021-27215 affects genuagate. Severity is critical (CVSS 9.8). 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 sp

How urgent is CVE-2021-27215?

Priority 65/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action

References

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