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.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Winmtr WinMTR affected
Version Status Constraints
0.91 affected —

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Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
http://winmtr.net cve-icon cve-icon
http://winmtr.net/winmtr_download/ cve-icon cve-icon
https://www.exploit-db.com/exploits/45769 cve-icon cve-icon
https://www.vulncheck.com/advisories/winmtr-denial-of-service-via-buffer-overflow cve-icon cve-icon
History

Sat, 30 May 2026 15:30:00 +0000

Type Values Removed Values Added
Description 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.
Title WinMTR 0.91 Denial of Service via Buffer Overflow
Weaknesses CWE-120
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 8.7, 'vector': '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'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-05-30T14:55:29.422Z

Reserved: 2026-05-30T14:44:38.854Z

Link: CVE-2018-25426

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-05-30T16:17:03.993

Modified: 2026-05-30T16:17:03.993

Link: CVE-2018-25426

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-30T16:30:27Z

Weaknesses