CVE-2019-25660 — LanHelper 1.74 Denial of Service via Buffer Overflow

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MEDIUM

LanHelper 1.74 Denial of Service via Buffer Overflow

Published Apr 5, 2026

6.9

MEDIUM

CVSS 4.0

EPSS 0.23%

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.

Affected products

Vendor Hainsoft Product LanHelper Default
n/a
- Version
  1.74
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

Hainsoft

LanHelper

n/a

Version	Status	Constraints
1.74	affected	-

Remediation

No remediation recorded yet.

Metrics

0.23% 0.00228

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.

EPSS probability 0.00228

Score over time

Apr–Oct 2026

EPSS v4
EPSS v5

Percentile over time

EPSS v4
EPSS v5

Table of values (3 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 3, 2026	0.23% (0.00228)	12.31th	v5 (v2026.06.15)
Jun 15, 2026	0.23% (0.00228)	13.30th	v5 (v2026.06.15)
Apr 6, 2026	0.01% (0.00012)	1.58th	v4 (v2025.03.14)

Weaknesses (1)

CWE-787

Out-of-bounds Write

References (3)

http://www.hainsoft.com/
productBroken Link
https://www.exploit-db.com/exploits/46295
exploitVDB Entry
https://www.vulncheck.com/advisories/lanhelper-denial-of-service-via-buffer-overflow
third-party-advisoryThird Party Advisory

Link	Providers	Tags
http://www.hainsoft.com/		productBroken Link
https://www.exploit-db.com/exploits/46295		exploitVDB Entry
https://www.vulncheck.com/advisories/lanhelper-denial-of-service-via-buffer-overflow		third-party-advisoryThird Party Advisory