CVE-2018-25426

WinMTR 0.91 Denial of Service via Buffer Overflow

CVSS 8.7 HIGHEPSS 0.5%CWE-120

Vexday Risk Score

41Attention

SSVC decision (CISA)

Attend

PoC available → attend closely

CVSS 8.7EPSS 0.5%KEV nãoPoC públicaNuclei —Metasploit —Patch —

Lifecycle

30 May 2026Published on NVD

Recommendation: Plan a near-term fix — a public PoC already exists.

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.

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

Affected products

Winmtr · WinMTR

public PoCs found — 1

cve_referencewww.exploit-db.com/exploits/45769unverified

⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

References

https://www.exploit-db.com/exploits/45769 https://www.vulncheck.com/advisories/winmtr-denial-of-service-via-buffer-overflow http://winmtr.net http://winmtr.net/winmtr_download/