CVE-2026-33268Network attack vector

Storage exhaustion via unauthenticated firmware uploads

Published Mar 25, 2026 · Updated Mar 25, 2026

Missing upload authentication in Nanoleaf Lines 12.3.2 allows remote attackers to store firmware files and consume device storage. The firmware-upload handler accepts and persists submitted firmware files without verifying an authenticated session or otherwise authorizing the request. Network reachability to the device is sufficient; repeated uploads consume finite storage, while the public record does not report code execution or firmware installation.

CVSS severity6.9
Medium
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing upload authentication in Nanoleaf Lines 12.3.2 allows remote attackers to store firmware files and consume device storage. The firmware-upload handler accepts and persists submitted firmware files without verifying an authenticated session or otherwise authorizing the request. Network reachability to the device is sufficient; repeated uploads consume finite storage, while the public record does not report code execution or firmware installation.

The record

CVE
CVE-2026-33268
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
Nanoleaf
Product
Nanoleaf Lines
Classifications
CWE-400, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=12.3.2 <12.3.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Nanoleaf · Nanoleaf Linesversion=12.3.2 <12.3.6

Published CVSS scores

6.5Cybersecurity and Infrastructure Security Agency (CISA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
6.9Cybersecurity and Infrastructure Security Agency (CISA)CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-400Uncontrolled Resource Consumption
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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