CVE-2024-23978

Arbitrary code execution via invalid-value heap overflow

Published Feb 2, 2024 · Updated May 15, 2025

Heap-based buffer overflow in KDDI HOME SPOT CUBE2 V102 and earlier allows remote attackers to execute arbitrary code via invalid values. Published advisories do not identify the affected request handler or explain how an invalid value causes a heap write to exceed its allocation. Exploitation requires access to an adjacent network and can execute code with the appliance process's privileges; the exact request format is undisclosed.

CVSS severity8.8
High
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap-based buffer overflow in KDDI HOME SPOT CUBE2 V102 and earlier allows remote attackers to execute arbitrary code via invalid values. Published advisories do not identify the affected request handler or explain how an invalid value causes a heap write to exceed its allocation. Exploitation requires access to an adjacent network and can execute code with the appliance process's privileges; the exact request format is undisclosed.

The record

CVE
CVE-2024-23978
Published
Feb 2, 2024
Updated
May 15, 2025
Vendor
KDDI Corporation
Product
HOME SPOT CUBE2
Classifications
CWE-122, CWE-787, T1210
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 2, 2024CVE publishedPublication date reported by the CVE source.
  2. May 15, 2025Record 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=V102 and earlier

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

KDDI Corporation · HOME SPOT CUBE2version=V102 and earlier

Published CVSS scores

9.8CISACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
8.8JPCERT/CCCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A: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)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-122Heap-based Buffer Overflow
CWE-787Out-of-bounds Write
T1210Exploitation of Remote Services

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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