WinMTR 0.91 Denial of Service via Buffer Overflow

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.

Problem type

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Affected products

Winmtr

WinMTR

0.91 - AFFECTED

References

ExploitDB-45769

https://www.exploit-db.com/exploits/45769

exploit

Official Product Homepage

http://winmtr.net

product

Product Reference

http://winmtr.net/winmtr_download/

product

VulnCheck Advisory: WinMTR 0.91 Denial of Service via Buffer Overflow

https://www.vulncheck.com/advisories/winmtr-denial-of-service-via-buffer-overflow

third-party-advisory

JSON source

https://cveawg.mitre.org/api/cve/CVE-2018-25426

Click to expand

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  "cveMetadata": {
    "cveId": "CVE-2018-25426",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-05-30T14:55:29.422Z",
    "dateReserved": "2026-05-30T14:44:38.854Z",
    "datePublished": "2026-05-30T14:55:29.422Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
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        "dateUpdated": "2026-05-30T14:55:29.422Z"
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      "datePublic": "2018-11-01T00:00:00.000Z",
      "title": "WinMTR 0.91 Denial of Service via Buffer Overflow",
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "affected": [
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      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')",
              "cweId": "CWE-120",
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            "privilegesRequired": "NONE",
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            "scope": "UNCHANGED",
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            "integrityImpact": "NONE",
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            "baseScore": 7.5,
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