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CVE-2024-40535

30
FAUCET Score

CVE-2024-40535 is a critical stack overflow vulnerability affecting Shenzhen Libituo Technology Co., Ltd LBT-T300-T400 v3.2 devices, specifically within the config_3g_para function via the apn_name_3g parameter. This vulnerability carries a CVSS score of 9.8, indicating a severe risk with network-based exploitation requiring no user interaction, and could lead to complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation (KEV list), public exploit code is currently unavailable, though the vulnerability has garnered significant community discussion with over 10 mentions.

Impacted Technologies

VendorProductVersion(s)CPE
3.2CPE matchmatch criteria
cpe:2.3:o:szlbt:lbt-t300-t400_firmware:3.2:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
43.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 23rd percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

github.com / tt01bolt/vul/blob/main/LBT-T300-T400_Buffer%20overflow.md
ExploitThird Party Advisory