CVE-2024-39815Network attack vector

Service crash via crafted pre-authentication HTTP request

Published Aug 8, 2024 · Updated Aug 21, 2024

Exceptional-condition handling in VONETS Wi-Fi bridge firmware 3.3.23.6.9 and earlier allows remote attackers to crash the HTTP service. The HTTP service fails to handle a condition triggered by a crafted request to a pre-authentication resource; no finer code locus is public. No credentials or user interaction are required, and exploitation interrupts the HTTP service without a reported confidentiality or integrity impact.

CVSS severity7.5
High
EPSS probability0.77%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Exceptional-condition handling in VONETS Wi-Fi bridge firmware 3.3.23.6.9 and earlier allows remote attackers to crash the HTTP service. The HTTP service fails to handle a condition triggered by a crafted request to a pre-authentication resource; no finer code locus is public. No credentials or user interaction are required, and exploitation interrupts the HTTP service without a reported confidentiality or integrity impact.

The record

CVE
CVE-2024-39815
Published
Aug 8, 2024
Updated
Aug 21, 2024
Vendor
VONETS
Product
VONETS VBG1200 Firmware
Classifications
CWE-703, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 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=0 <=3.3.23.6.9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

VONETS · VONETS VBG1200 Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VGA-1000 Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAR1200-L Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAP11G-500 Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAP11S-5G Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAP11G-300 Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAP11S Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAP11G Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAR11N-300 Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAP11N-300 Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAP11AC Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAP11G-500S Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAR600-H Firmwareversion=0 <=3.3.23.6.9
VONETS · VONETS VAR1200-H Firmwareversion=0 <=3.3.23.6.9

Published CVSS scores

9.1ICS-CERTCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
9.4ICS-CERTCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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-703Improper Check or Handling of Exceptional Conditions
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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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