CVE-2022-22570
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 · uneditedA buffer overflow vulnerability found in the UniFi Door Access Reader Lite’s (UA Lite) firmware (Version 3.8.28.24 and earlier) allows a malicious actor who has gained access to a network to control all connected UA devices. This vulnerability is fixed in Version 3.8.31.13 and later.
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 confidenceBuffer overflow in UniFi Door Access Reader Lite firmware (versions 3.8.28.24 and earlier) allows a network-adjacent attacker to execute arbitrary code and gain control of connected UA devices. This is a critical firmware vulnerability in physical access control hardware.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data< 3.8.31.13CVSS 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:3.1/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 checksWork through these to decide whether this CVE applies to you.
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Identify the device modelCheck the physical UniFi Door Access Reader Lite device or access its management interface to confirm it is a UA Lite model. This vulnerability only affects the Reader Lite hardware, not other UniFi access devices.Affected if Device is not a UniFi Door Access Reader Lite model
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Access firmware version informationLog into the UniFi Door Access Reader Lite management console or access it via the UniFi Network controller. Navigate to the device settings or firmware information section to retrieve the current running firmware version.Affected if Unable to retrieve firmware version from device interface
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Compare installed version to affected rangeCompare the installed firmware version number to the affected range: versions earlier than 3.8.31.13 (including 3.8.28.24 and all prior versions) are vulnerable. The specific vulnerable versions are < 3.8.31.13.Affected if Installed firmware version is earlier than 3.8.31.13 (for example 3.8.28.24, 3.8.20.15, or any version below 3.8.31.13)
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Verify network exposureConfirm the device is network-adjacent to untrusted networks, as the attack vector requires a network-adjacent attacker. Check network segmentation and ACLs controlling access to the UA Lite device.Affected if Device is accessible from untrusted network segments without firewall protection
A system is affected if it is a UniFi Door Access Reader Lite running firmware version earlier than 3.8.31.13.
Generated from the published advisory. Verify against your own configuration.
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.
dbcve · scoped3.8.31.13
Update UA Lite firmware to version 3.8.31.13 or later. Prior to deployment, verify the update in a staging environment to ensure door access functionality remains operational.
Firmware version 3.8.31.13 or later
- Obtain UniFi Door Access Reader Lite firmware version 3.8.31.13 or later from the official Ubiquiti downloads portal
- Access the UniFi management console or UA Lite device management interface
- Navigate to the device settings for the UA Lite reader
- Upload the downloaded firmware file (3.8.31.13 or later) to the device
- Apply the firmware update and wait for the device to reboot
- Verify the installed firmware version is 3.8.31.13 or higher
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation6.0 h
- Implementation12.0 h
- Testing10.0 h
- Review / QA4.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2022-22570 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2022-22570 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- 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
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