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CVE-2026-55112: A malicious actor with access to the network and low privileges and under certain conditions could exploit an

34
Routine
HIGH 7.5UPGRADEUPGRADEUPGRADE

CVE-2026-55112 is a high-severity flaw (CVSS 7.5) affecting unifi dream machine pro firmware, unifi dream machine special edition firmware, unifi dream machine pro max firmware. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A malicious actor with access to the network and low privileges and under certain conditions could exploit an Improper Access Control vulnerability found in UniFi OS with UniFi Protect Application to escalate privileges on the host device.

Why this priority

  • High severity

A fixed release or distro patch exists.

Risk facts

CVSS score7.5 (High)
Attack vectorNetwork (remote)
Attack complexityHigh
Privileges neededLow
User interactionNone
EPSS exploit chance0.4% (top 71%)
CISA exploited listNo
WeaknessCWE-284
Published2026-07-02
Last modified2026-07-10
Publisher (CNA): HackerOne · Vendor: ui

Share: LinkedIn · X · Reddit

Last updated 2026-07-10 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

ui unifi dream machine pro firmware UPGRADE
Affected: <= 5.1.15
Fixed in: newer than 5.1.15
Safe to downgrade to: no unaffected older release
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.
ui unifi dream machine special edition firmware UPGRADE
Affected: <= 5.1.15
Fixed in: newer than 5.1.15
Safe to downgrade to: no unaffected older release
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.
ui unifi dream machine pro max firmware UPGRADE
Affected: <= 5.1.15
Fixed in: newer than 5.1.15
Safe to downgrade to: no unaffected older release
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.
ui unifi dream machine beast firmware UPGRADE
Affected: <= 5.1.15
Fixed in: newer than 5.1.15
Safe to downgrade to: no unaffected older release
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.
ui unifi dream router firmware UPGRADE
Affected: <= 5.1.15
Fixed in: newer than 5.1.15
Safe to downgrade to: no unaffected older release
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.
ui unifi dream wall firmware UPGRADE
Affected: <= 5.1.15
Fixed in: newer than 5.1.15
Safe to downgrade to: no unaffected older release
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-2026-55112?

unifi dream machine pro firmware: upgrade to newer than 5.1.15; unifi dream machine special edition firmware: upgrade to newer than 5.1.15; unifi dream machine pro max firmware: upgrade to newer than 5.1.15. Exact commands for each OS are on this page.

Is CVE-2026-55112 being exploited?

CVE-2026-55112 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-2026-55112 affect?

CVE-2026-55112 affects unifi dream machine pro firmware, unifi dream machine special edition firmware, unifi dream machine pro max firmware. Severity is high (CVSS 7.5). A malicious actor with access to the network and low privileges and under certain conditions could exploit an Improper Access Control vulnerability found in UniFi OS with UniFi Protect Application to escalate privileges on the host device.

How urgent is CVE-2026-55112?

Priority 34/100. High severity

Software pages

Ubiquiti vulnerabilities

Related CVEs

References

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