CVE-2019-25660
LanHelper 1.74 Denial of Service via Buffer Overflow
Description
LanHelper 1.74 contains a local buffer overflow vulnerability that allows attackers to crash the application by sending excessively long input strings. Attackers can exploit the Form Send Message feature by pasting 6000 bytes of data into the Message text field to trigger a denial of service condition.
INFO
Published Date :
April 5, 2026, 9:16 p.m.
Last Modified :
April 20, 2026, 6:15 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update LanHelper to a version that patches the buffer overflow.
- Sanitize user input to prevent overly long strings.
- Validate message input length before processing.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2019-25660.
| URL | Resource |
|---|---|
| http://www.hainsoft.com/ | Broken Link |
| https://www.exploit-db.com/exploits/46295 | Exploit VDB Entry |
| https://www.vulncheck.com/advisories/lanhelper-denial-of-service-via-buffer-overflow | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2019-25660 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2019-25660
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2019-25660 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2019-25660 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 20, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:hainsoft:lanhelper:*:*:*:*:*:*:*:* versions up to (including) 1.74 Added Reference Type VulnCheck: http://www.hainsoft.com/ Types: Broken Link Added Reference Type VulnCheck: https://www.exploit-db.com/exploits/46295 Types: Exploit, VDB Entry Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/lanhelper-denial-of-service-via-buffer-overflow Types: Third Party Advisory -
New CVE Received by [email protected]
Apr. 05, 2026
Action Type Old Value New Value Added Description LanHelper 1.74 contains a local buffer overflow vulnerability that allows attackers to crash the application by sending excessively long input strings. Attackers can exploit the Form Send Message feature by pasting 6000 bytes of data into the Message text field to trigger a denial of service condition. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-787 Added Reference http://www.hainsoft.com/ Added Reference https://www.exploit-db.com/exploits/46295 Added Reference https://www.vulncheck.com/advisories/lanhelper-denial-of-service-via-buffer-overflow