dbcve.org
Heap-based Buffer OverflowWeakness · CWE-122

CVE-2025-23123

CRITICAL · 10.0 CVSS v3.0 Published 2025-05-19
Mitigation only
No fix yet — a mitigation exists. There is no fixed release. A documented workaround reduces exposure in the meantime.
See remediation →
100/100
Remediation priority · Urgent
Remotely reachable No privileges Zero-click

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
A malicious actor with access to the management network could execute a remote code execution (RCE) by exploiting a heap buffer overflow vulnerability in the UniFi Protect Cameras (Version 4.75.43 and earlier) firmware.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis · high confidence

A heap buffer overflow vulnerability exists in UniFi Protect Cameras firmware versions 4.75.43 and earlier. An attacker with access to the management network can trigger the overflow to achieve remote code execution, allowing full compromise of affected camera devices.

MitigationImmediately restrict management network access to authorized personnel only, and update all UniFi Protect Cameras to firmware versions newer than 4.75.43 once the vendor patch is available.

Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.

dbcve checks

Work through these to decide whether this CVE applies to you.

  1. Identify UniFi Protect Camera model
    Locate the specific UniFi Protect camera model in your environment and note its model number. Access the UniFi Protect application or UniFi OS console to view connected devices.
    Affected if The device is a UniFi Protect Camera
  2. Check installed firmware version
    In UniFi Protect or the UniFi OS console, navigate to the camera's settings or device overview page. Look for the firmware version field displayed for each camera device.
    Affected if The displayed firmware version is 4.75.43 or any version number lower than 4.75.43
  3. Verify management network exposure
    Review your network configuration to determine whether the UniFi Protect cameras management interface (typically ports 443, 8080, or the UniFi Protect application port) is accessible from networks beyond your authorized management VLAN. Check firewall rules, VLAN configurations, and access control lists.
    Affected if The camera management interface is reachable from networks other than a dedicated management VLAN

If the UniFi Protect Camera runs firmware version 4.75.43 or earlier AND its management interface is accessible from an untrusted network, the environment is affected by CVE-2025-23123.

Generated from the published advisory. Verify against your own configuration.

Check your environment

Paste your version and any relevant configuration and it will be compared against the affected criteria above. Do not include secrets or credentials.

AI-assisted, checked against the advisory. Informational, not a guarantee.

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

From vendor data
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Immediately restrict management network access to authorized personnel only, and update all UniFi Protect Cameras to firmware versions newer than 4.75.43 once the vendor patch is available.

Have this fixed Scoped from the published advisory
  • Consultation4.0 h
  • Implementation8.0 h
  • Testing6.0 h
  • Review / QA2.0 h
20.0 hours of engineering $3,500
Get help mitigating

An estimate, not a bill — we confirm scope with you before any work starts. Need it this week? Rush from $5,600.

Scan for this in your stack

Free · runs locally
dbcve dependency scanner

Check whether your project pulls in CVE-2025-23123 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.

Get it on GitHub Scan in the browser

References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-23123 in production — separate from our analysis above.

No notes yet

Be the first to add a field note for this CVE — a mitigation you’ve verified, a version caveat, or a link to a working fix. Sign in above to contribute.

What this is

A place for practitioners to share what actually worked: a mitigation you’ve tested, a configuration change, a version- or environment-specific caveat, or a link to a verified patch. The most useful notes rise to the top as peers upvote them, so the signal stays high.

What belongs here
  • Verified mitigations, workarounds, and config changes
  • Version or environment caveats, and links to real fixes
  • No weaponised exploit code, or anything meant to cause harm
  • No spam, self-promotion, credentials, or personal data