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Fx9500 FirmwareOperating system · Zebra

CVE-2021-32089

CRITICAL · 9.8 CVSS v3.1 Published 2021-05-11
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
An issue was discovered on Zebra (formerly Motorola Solutions) Fixed RFID Reader FX9500 devices. An unauthenticated attacker can upload arbitrary files to the filesystem that can then be accessed through the web interface. This can lead to information disclosure and code execution. NOTE: This vulnerability only affects products that are no longer supported by the maintainer

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 · moderate confidence

The FX9500 RFID reader web interface lacks authentication controls on its file upload functionality, allowing unauthenticated attackers to write arbitrary files to the device filesystem. These uploaded files are subsequently accessible through the web interface, enabling attackers to disclose sensitive information or upload malicious code for remote execution.

MitigationSince the product is end-of-life and no vendor patches are available, isolate the device behind a firewall restricting all web interface access, or replace with a supported RFID reader model.

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
Fx9500 FirmwareOperating system
Affected:all versions

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
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 Zebra FX9500 devices in your environment
    Review network scans, asset inventories, or physical location records to locate all Zebra FX9500 RFID readers. Check device labels, management interfaces, or SNMP outputs for the model number.
    Affected if Any Zebra FX9500 RFID reader is present in the environment.
  2. Confirm device web interface is accessible
    Attempt to reach the device web interface via HTTP/HTTPS on the expected management IP address. Common ports are 80 and 443. A login page or device status page indicates the web interface is active.
    Affected if The web interface responds to HTTP/HTTPS requests on any accessible network segment.
  3. Test unauthenticated access to file upload endpoint
    Send a crafted HTTP POST request to the device upload endpoint without providing any authentication credentials. The exact path may vary; common paths include /upload, /cgi-bin/upload, or /fwupgrade.cgi. Check if the request is accepted rather than rejected with an authentication error.
    Affected if The device accepts file upload requests without requiring login credentials.
  4. Verify uploaded files are retrievable via web server
    After uploading a test file (such as a harmless text file), attempt to retrieve it via HTTP GET using the expected web URL path. Common patterns include /upload/<filename> or /files/<filename>.
    Affected if Uploaded files are accessible through the web interface without authentication.
  5. Review network segmentation and access controls
    Examine firewall rules, ACLs, or VLAN assignments to determine if the device web interface is reachable from untrusted networks or the internet. Document all IP ranges that can access the web interface.
    Affected if The web interface is accessible from networks outside the local management segment.

If a Zebra FX9500 RFID reader with an exposed web interface allows unauthenticated file uploads and serves uploaded files back, the environment is affected by CVE-2021-32089.

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.

dbcve · scoped
Mitigation available No clean upgrade yet — mitigate in the meantime
Mitigation

Since the product is end-of-life and no vendor patches are available, isolate the device behind a firewall restricting all web interface access, or replace with a supported RFID reader model.

Recommended fix High confidence
  1. Since the Zebra FX9500 is end-of-life and no longer supported by the vendor, there is no official patch or firmware upgrade available.
  2. If the device must remain in service, network segmentation should be implemented to isolate the RFID reader from untrusted networks.
  3. Restrict access to the device's web interface by placing it behind a firewall or VPN with strict access control lists.
  4. Disable the web interface if not required for operation.
  5. Monitor network traffic to and from the device for suspicious activity.
  6. Consider replacing the end-of-life device with a currently supported RFID reader model.
Caveat The FX9500 is end-of-life with no vendor support; no firmware updates will be released

Generated from the published advisory — verify against the referenced sources before acting.

Fix this in Fx9500 Firmware Scoped from the published advisory
  • Consultation4.0 h
  • Implementation6.0 h
  • Testing4.0 h
  • Review / QA2.0 h
16.0 hours of engineering $2,840
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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-2021-32089 in production — separate from our analysis above.

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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
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  • Version or environment caveats, and links to real fixes
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