Buffer overflow in Hainsoft Lanhelper
CVE-2019-25660
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (12.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 12.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Hainsoft Lanhelper — versions 1.74
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/46295 (Exploit, VDB Entry, exploit)
- www.hainsoft.com/ (product, Broken Link)
- www.vulncheck.com/advisories/lanhelper-denial-of-service-via-buffer-overflow (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2019-25660?
- CVE-2019-25660 is a medium-severity vulnerability in Hainsoft Lanhelper, classified under Out-of-bounds Write. CVSS score: 6.2/10. Published 2026-04-05.
- How severe is CVE-2019-25660?
- Medium severity. CVSS v3 base score is 6.2 out of 10.