CVE-2024-40722Network attack vector

Service interruption via API stack buffer overflow

Published Aug 2, 2024 · Updated Aug 2, 2024

Stack buffer overflow in CHANGING Information Technology TCBServiSign for Windows before 1.0.24.0318 allows remote attackers to interrupt service. The unnamed API fails to validate server-side input length before processing it in a stack buffer. Exploitation requires a user to visit a spoofed website, and the documented consequence is temporary interruption of the local component service.

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 buffer overflow in CHANGING Information Technology TCBServiSign for Windows before 1.0.24.0318 allows remote attackers to interrupt service. The unnamed API fails to validate server-side input length before processing it in a stack buffer. Exploitation requires a user to visit a spoofed website, and the documented consequence is temporary interruption of the local component service.

The record

CVE
CVE-2024-40722
Published
Aug 2, 2024
Updated
Aug 2, 2024
Vendor
CHANGING Information Technology Inc.
Product
TCBServiSign for Windows
Classifications
CWE-121, CAPEC-100, T1499.004
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 <1.0.24.0318

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

CHANGING Information Technology Inc. · TCBServiSign for Windowsversion=0 <1.0.24.0318

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-121CWE-121 Stack-based Buffer Overflow
CAPEC-100Overflow Buffers
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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