What is CVE-2018-25423?

CVE-2018-25423 is a medium-severity vulnerability in Armcode Arm Whois, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.2/10. Published 2026-05-30.

How severe is CVE-2018-25423?

Medium severity. CVSS v3 base score is 6.2 out of 10.

Buffer overflow in Armcode Arm Whois

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 fi…

Vulnerability class: Buffer Overflow

EPSS: 0.000 (3.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Armcode Arm Whois — versions 3.11

Weakness classification (CWE)

CWE-120 — Buffer Copy without Checking Size of Input (Classic Buffer Overflow)

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2018-25423?: CVE-2018-25423 is a medium-severity vulnerability in Armcode Arm Whois, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 6.2/10. Published 2026-05-30.
How severe is CVE-2018-25423?: Medium severity. CVSS v3 base score is 6.2 out of 10.