CVE-2019-25660: LanHelper 1.74 contains a local buffer overflow vulnerability that allows attackers to crash the application b

Q: How do I fix CVE-2019-25660?

lanhelper: upgrade to newer than 1.74. Exact commands for each OS are on this page.

Q: Is CVE-2019-25660 being exploited?

CVE-2019-25660 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2019-25660 affect?

CVE-2019-25660 affects lanhelper. Severity is medium (CVSS 6.2). 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 t

Q: How urgent is CVE-2019-25660?

Priority 30/100. Public exploit reference

Routine

MEDIUM 6.2UPGRADE

CVE-2019-25660 is a medium-severity flaw (CVSS 6.2) affecting lanhelper. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Public exploit reference

A fixed release or distro patch exists.

Risk facts

CVSS score	6.2 (Medium)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.2% (top 87%)
CISA exploited list	No
Weakness	CWE-787
Published	2026-04-05
Last modified	2026-07-24

Publisher (CNA): VulnCheck · Vendor: hainsoft

Last updated 2026-07-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-04-05 21:16 UTCPublished CVE record published
2026-07-24 22:10 UTCUpdated Record last modified

hainsoft lanhelper UPGRADE

Affected: <= 1.74

Fixed in: newer than 1.74

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy lanhelper || rpm -q lanhelper || lanhelper --version

2. UPGRADE to newer than 1.74 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade lanhelper

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade lanhelper

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-25660?

lanhelper: upgrade to newer than 1.74. Exact commands for each OS are on this page.

Is CVE-2019-25660 being exploited?

CVE-2019-25660 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-25660 affect?

CVE-2019-25660 affects lanhelper. Severity is medium (CVSS 6.2). 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 t

How urgent is CVE-2019-25660?

Priority 30/100. Public exploit reference

References

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