CVE-2024-40723Network attack vector

Service interruption via unchecked API input length

Published Aug 2, 2024 · Updated Aug 2, 2024

Stack-based buffer overflow in HWATAI ServiSign for Windows before 1.0.24.0219 allows remote attackers to interrupt its service. An unspecified API fails to validate the length of server-side input before placing it in a stack buffer. Exploitation requires a user to visit a spoofed website; the documented consequence is temporary service disruption, with no reported data access or modification.

CVSS severity4.3
Medium
EPSS probability0.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stack-based buffer overflow in HWATAI ServiSign for Windows before 1.0.24.0219 allows remote attackers to interrupt its service. An unspecified API fails to validate the length of server-side input before placing it in a stack buffer. Exploitation requires a user to visit a spoofed website; the documented consequence is temporary service disruption, with no reported data access or modification.

The record

CVE
CVE-2024-40723
Published
Aug 2, 2024
Updated
Aug 2, 2024
Vendor
CHANGING Information Technology Inc.
Product
HWATAI ServiSign for Windows
Classifications
CWE-121, CAPEC-100
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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 <1.0.24.0219

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CHANGING Information Technology Inc. · HWATAI ServiSign for Windowsversion=0 <1.0.24.0219

Published CVSS scores

4.3TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:R/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.

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-121Stack-based Buffer Overflow
CAPEC-100Overflow Buffers

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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