How severe is CVE-2018-25426?

CVE-2018-25426 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-25426 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-25426?

CVE-2018-25426 affects Winmtr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-25426?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2018-25426 have an EU (EUVD) identifier?

Yes. CVE-2018-25426 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-21948.

When was CVE-2018-25426 published?

CVE-2018-25426 was published on 2026-05-30 and last updated on 2026-06-17.

CVE-2018-25426

CVE-2018-25426 is a high-severity vulnerability in Winmtr with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-120.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 1% (40th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2018-21948
Weakness: CWE-120
Affected product: Winmtr
Published: 2026-05-30
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2018-25426?: 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.
How severe is CVE-2018-25426?: CVE-2018-25426 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-25426 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (40th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-25426?: CVE-2018-25426 affects Winmtr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-25426?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2018-25426 have an EU (EUVD) identifier?: Yes. CVE-2018-25426 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-21948.
When was CVE-2018-25426 published?: CVE-2018-25426 was published on 2026-05-30 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:winmtr:winmtr:0.91:*:*:*:*:*:*:*

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