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CVE-2022-2302: Multiple Lenze products of the cabinet series skip the password verification upon second login

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This week
CRITICAL 9.8REMOTEUPGRADEUPGRADEUPGRADE

CVE-2022-2302 is a critical-severity flaw (CVSS 9.8) affecting c520 firmware, c550 firmware, c750 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Multiple Lenze products of the cabinet series skip the password verification upon second login. After a user has been logged on to the device once, a remote attacker can get full access without knowledge of the password.

Why this priority

  • Critical severity
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score9.8 (Critical)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance2.1% (top 18%)
CISA exploited listNo
WeaknessCWE-304, CWE-287
Published2022-07-11
Last modified2026-06-17
Publisher (CNA): CERT VDE · Vendor: lenze

Share: LinkedIn · X · Reddit

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

Am I affected?

Timeline

lenze c520 firmware UPGRADE
Affected: >= 1.07.00.2757 and < 01.08.01.3021
Fixed in: 01.08.01.3021
Safe to downgrade to: a release before 1.07.00.2757
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
lenze c550 firmware UPGRADE
Affected: >= 1.07.00.2757 and < 01.08.01.3021
Fixed in: 01.08.01.3021
Safe to downgrade to: a release before 1.07.00.2757
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
lenze c750 firmware UPGRADE
Affected: >= 1.07.00.2757 and < 01.08.01.3021
Fixed in: 01.08.01.3021
Safe to downgrade to: a release before 1.07.00.2757
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
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-2022-2302?

c520 firmware: upgrade to 01.08.01.3021; c550 firmware: upgrade to 01.08.01.3021; c750 firmware: upgrade to 01.08.01.3021. Exact commands for each OS are on this page.

Is CVE-2022-2302 being exploited?

CVE-2022-2302 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-2022-2302 affect?

CVE-2022-2302 affects c520 firmware, c550 firmware, c750 firmware. Severity is critical (CVSS 9.8). Multiple Lenze products of the cabinet series skip the password verification upon second login. After a user has been logged on to the device once, a remote attacker can get full access without knowledge of the password.

How urgent is CVE-2022-2302?

Priority 60/100. Critical severity; Remotely exploitable, no login, no user action

References

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