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CVE-2024-40722

15
FAUCET Score

CVE-2024-40722 is a stack-based buffer overflow vulnerability affecting the TCBServiSign Windows Version from CHANGING Information Technology. It arises from insufficient validation of server-side input length, allowing unauthenticated remote attackers to disrupt service when a user visits a spoofed website. Rated Medium (CVSS 4.3), this vulnerability requires user interaction (UI:R) and has a low impact on availability (A:L), with no confidentiality or integrity impact. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.0.24.0318CPE matchmatch criteria
cpe:2.3:a:changingtec:tcb_servisign:*:*:*:*:*:windows:*:*

CVSS Data

CVSS version used by this source: 3.1

4.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
2.8
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.48%
Probability of exploitation in next 30 days
EPSS Percentile
38.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0048 is in the 41st percentile among its peer group of 26,236 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

twcert.org.tw / en/cp-139-7973-e10c6-2.html
Third Party Advisory
twcert.org.tw / tw/cp-132-7967-9efdf-1.html
Third Party Advisory