CVE-2024-33623Public exploitNetwork attack vector

Unauthenticated reboot via malformed firmware-update POST

Published Oct 30, 2024 · Updated Oct 30, 2024

Infinite-loop denial of service in LevelOne WBR-6012 R0.40e6 allows remote attackers to reboot the router via an HTTP POST request. The http_main /upg branch parses malformed POST data without validation, then scans indefinitely for a carriage return that may be absent. No authentication is required; triggering the flaw crashes and reboots the appliance, interrupting routing and wireless service.

CVSS severity3.7
Low
EPSS probability11.89%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Infinite-loop denial of service in LevelOne WBR-6012 R0.40e6 allows remote attackers to reboot the router via an HTTP POST request. The http_main /upg branch parses malformed POST data without validation, then scans indefinitely for a carriage return that may be absent. No authentication is required; triggering the flaw crashes and reboots the appliance, interrupting routing and wireless service.

The record

CVE
CVE-2024-33623
Published
Oct 30, 2024
Updated
Oct 30, 2024
Vendor
LevelOne
Product
WBR-6012
Classifications
CWE-835, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 30, 2024CVE publishedPublication date reported by the CVE source.
  2. Oct 30, 2024Record 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=R0.40e6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

LevelOne · WBR-6012version=R0.40e6

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.7Cisco TalosCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

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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 exploitPublished

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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