What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-05 · updated 2026-07-24
• Weakness: CWE-787

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

• Hainsoft LanHelper: through 1.74

References

• http://www.hainsoft.com/
• https://www.exploit-db.com/exploits/46295
• https://www.vulncheck.com/advisories/lanhelper-denial-of-service-via-buffer-overflow

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