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CVE-2020-21996: AVE DOMINAplus <=1.10.x suffers from an unauthenticated reboot command execution

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HIGH 7.5REMOTEUPGRADEMITIGATEMITIGATE

CVE-2020-21996 is a high-severity flaw (CVSS 7.5) affecting dominaplus, 53ab-wbs firmware, ts01 firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

AVE DOMINAplus <=1.10.x suffers from an unauthenticated reboot command execution. Attackers can exploit this issue to cause a denial of service scenario.

Why this priority

  • High severity
  • Public exploit reference
  • Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityLow
Privileges neededNone
User interactionNone
EPSS exploit chance3.6% (top 11%)
CISA exploited listNo
WeaknessCWE-306
Published2021-04-28
Last modified2026-06-17
Publisher (CNA): MITRE · Vendor: ave

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

ave dominaplus UPGRADE
Affected: >= 1.8.4 and <= 1.10.77
Fixed in: newer than 1.10.77
Safe to downgrade to: a release before 1.8.4
1. Check installed version
apt-cache policy dominaplus || rpm -q dominaplus || dominaplus --version
2. UPGRADE to newer than 1.10.77 (Debian / Ubuntu)
sudo apt update && sudo apt install --only-upgrade dominaplus
2. UPGRADE (RHEL / Amazon Linux / Fedora)
sudo dnf upgrade dominaplus
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 1.8.4 (Debian / Ubuntu)
apt-cache madison dominaplus sudo apt install dominaplus=<VERSION_BEFORE_1.8.4> sudo apt-mark hold dominaplus
3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)
dnf --showduplicates list dominaplus sudo dnf downgrade dominaplus-<VERSION_BEFORE_1.8.4> sudo dnf versionlock add dominaplus
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.
ave 53ab-wbs firmware MITIGATE
Affected: 1.10.62
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.10.62
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.
ave ts01 firmware MITIGATE
Affected: 1.0.65
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.0.65
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.
ave ts03x-v firmware MITIGATE
Affected: 1.10.45a
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.10.45a
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.
ave ts04x-v firmware MITIGATE
Affected: 1.10.45a
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.10.45a
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.
ave ts05 firmware MITIGATE
Affected: 1.10.36
Fixed in: no fixed release known
Safe to downgrade to: a release before 1.10.36
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-2020-21996?

dominaplus: upgrade to newer than 1.10.77; 53ab-wbs firmware: mitigate or apply the listed mitigation; ts01 firmware: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-21996 being exploited?

CVE-2020-21996 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-2020-21996 affect?

CVE-2020-21996 affects dominaplus, 53ab-wbs firmware, ts01 firmware. Severity is high (CVSS 7.5). AVE DOMINAplus <=1.10.x suffers from an unauthenticated reboot command execution. Attackers can exploit this issue to cause a denial of service scenario.

How urgent is CVE-2020-21996?

Priority 59/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

References

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