How severe is CVE-2018-25423?

CVE-2018-25423 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2018-25423 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2018-25423?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2018-25423 have an EU (EUVD) identifier?

Yes. CVE-2018-25423 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-21945.

When was CVE-2018-25423 published?

CVE-2018-25423 was published on 2026-05-30 and last updated on 2026-06-17.

CVE-2018-25423

CVE-2018-25423 is a medium-severity vulnerability with a CVSS 3.x base score of 6.2. 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: Medium (CVSS 3.x base score 6.2)
CVSS v4: 6.9
EPSS exploit prediction: 0% (4th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2018-21945
Weakness: CWE-120
Published: 2026-05-30
Last modified: 2026-06-17

Description

Arm Whois 3.11 contains a buffer overflow vulnerability that allows local attackers to crash the application by supplying an oversized input string. Attackers can paste a malicious buffer of 700 bytes into the IP address or domain input field to trigger a denial of service condition.

Frequently asked questions

What is CVE-2018-25423?: Arm Whois 3.11 contains a buffer overflow vulnerability that allows local attackers to crash the application by supplying an oversized input string. Attackers can paste a malicious buffer of 700 bytes into the IP address or domain input field to trigger a denial of service condition.
How severe is CVE-2018-25423?: CVE-2018-25423 has a CVSS 3.x base score of 6.2, rated medium severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2018-25423 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2018-25423?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2018-25423 have an EU (EUVD) identifier?: Yes. CVE-2018-25423 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2018-21945.
When was CVE-2018-25423 published?: CVE-2018-25423 was published on 2026-05-30 and last updated on 2026-06-17.

References

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