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NVD / CVE Program· CNA Ubiquiti

CVE-2026-77545: A malicious actor with access to the network, low privileges and under certain conditions could exploit an Active Debug Code vulnerability f

Noroxi assessment

Priority: Monitor (action score 36/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.43% (FIRST EPSS).
  • Anyone who can reach it over the internet can trigger it. A low-privileged account is enough. A user must open a link or visit a page. No special conditions are required; it is repeatable.
  • Fixed version: Ubiquiti Inc Cloud Gateways 5.1.31; Ubiquiti Inc Cloud Keys 5.1.31; Ubiquiti Inc Dream Machines 5.1.31.

Low priority for now. Upgrade to Ubiquiti Inc Cloud Gateways 5.1.31; Ubiquiti Inc Cloud Keys 5.1.31; Ubiquiti Inc Dream Machines 5.1.31 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A malicious actor with access to the network, low privileges and under certain conditions could exploit an Active Debug Code vulnerability found in certain devices running UniFi OS to escalate privileges within such UniFi OS devices or instances.

CriticalCVSS 9.0 · v3.1—No exploit Fix available
Published
Aug 26, 2026
Updated
Aug 28, 2026
EPSS
0.4% · 37th percentile

Report tools

JSON

Action score

36

Monitor

Low priority for now.

CVSS
36 / 40 · 9.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Ubiquiti
9.0
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-77545

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Ubiquiti). Independent of NVD's CPE analysis and usually ahead of it.

  • Ubiquiti Inc Cloud Gateways

    • before 5.1.31affected · semver

  • Ubiquiti Inc Cloud Keys

    • before 5.1.31affected · semver

  • Ubiquiti Inc Dream Machines

    • before 5.1.31affected · semver

  • Ubiquiti Inc Dream Routers

    • before 5.1.31affected · semver

  • Ubiquiti Inc Dream Wall

    • before 5.1.31affected · semver

  • Ubiquiti Inc Enterprise Firewall Core

    • before 5.1.31affected · semver

  • Ubiquiti Inc Enterprise Fortress Gateway

    • before 5.1.31affected · semver

  • Ubiquiti Inc Enterprise Network Attached Storage

    • before 5.1.31affected · semver

  • Ubiquiti Inc Enterprise Network Video Recorders

    • before 5.1.31affected · semver

  • Ubiquiti Inc Express 7

    • before 5.1.31affected · semver

  • Ubiquiti Inc Network Attached Storage

    • before 5.1.32affected · semver

  • Ubiquiti Inc Network Video Recorders

    • before 5.1.31affected · semver

Same product

ubiquiti inc: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-77550A malicious actor with access to the network could exploit an Improper Neutralization of CRLF Sequences vulnerability found in certain devic
    40Plan
  • CVE-2026-77536A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devi
    39Monitor
  • CVE-2026-77534A malicious actor with access to the network and low privileges could exploit an Improper Access Control vulnerability found in certain devi
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-77539Aug 26, 2026 · A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS
    36Monitor
  • ← EarlierCVE-2026-77540Aug 26, 2026 · A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS
    36Monitor
  • Later →CVE-2026-77549Aug 26, 2026 · A malicious actor with access to the network and under certain conditions could exploit an Improper Neutralization of CRLF Sequences vulnera
    36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Ubiquiti Inc Cloud Gateways5.1.31Vendor (CNA)
Ubiquiti Inc Cloud Keys5.1.31Vendor (CNA)
Ubiquiti Inc Dream Machines5.1.31Vendor (CNA)
Ubiquiti Inc Dream Routers5.1.31Vendor (CNA)
Ubiquiti Inc Dream Wall5.1.31Vendor (CNA)
Ubiquiti Inc Enterprise Firewall Core5.1.31Vendor (CNA)
Ubiquiti Inc Enterprise Fortress Gateway5.1.31Vendor (CNA)
Ubiquiti Inc Enterprise Network Attached Storage5.1.31Vendor (CNA)
Ubiquiti Inc Enterprise Network Video Recorders5.1.31Vendor (CNA)
Ubiquiti Inc Express 75.1.31Vendor (CNA)
Ubiquiti Inc Network Attached Storage5.1.32Vendor (CNA)
Ubiquiti Inc Network Video Recorders5.1.31Vendor (CNA)
Ubiquiti Inc UniFi OS Server5.1.37Vendor (CNA)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • A low-privileged account is enough.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-489 · Active Debug Code

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records