Vulnerability record · CVE-2018-25426 · published 30 May 2026

CVE-2018-25426: Winmtr classic buffer overflow vulnerability

Winmtr · Winmtr

WinMTR 0.91 contains a denial of service vulnerability that allows attackers to crash the application by sending a malformed payload file containing a large buffer of repeated characters. Attackers can create a specially crafted input file with 238 bytes of data to trigger a buffer overflow condition that causes the application to crash.

8.7 CVSS 4.0 High EPSS 0.51% · top 58.6% CWE-120 · Classic buffer overflow

8.7CVSS 4.0 base score

0.51%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

4References, 2 tagged exploit

22 Jul 2026Last modified by NVD

Description

CVSS:4.0/AV:N/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Winmtr Winmtr

References

Link	Tags
http://winmtr.net	Product
http://winmtr.net/winmtr_download/	Exploit
https://www.exploit-db.com/exploits/45769	ExploitThird Party AdvisoryVDB Entry
https://www.vulncheck.com/advisories/winmtr-denial-of-service-via-buffer-overflow	Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2018-25426), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.