CVE-2018-25423Public exploit

Application crash via oversized lookup string

Published May 30, 2026 · Updated May 30, 2026

Classic buffer overflow in ArmCode Arm Whois 3.11 allows local users to crash the application through an oversized lookup string. The public proof of concept fills the IP address or domain field with 700 A characters, starts information retrieval, and demonstrates a process crash. Exploitation requires interactive local access to paste the string and click the retrieval control; only application unavailability is demonstrated.

CVSS severity6.9
Medium
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Classic buffer overflow in ArmCode Arm Whois 3.11 allows local users to crash the application through an oversized lookup string. The public proof of concept fills the IP address or domain field with 700 A characters, starts information retrieval, and demonstrates a process crash. Exploitation requires interactive local access to paste the string and click the retrieval control; only application unavailability is demonstrated.

The record

CVE
CVE-2018-25423
Published
May 30, 2026
Updated
May 30, 2026
Vendor
ArmCode
Product
Arm Whois
Classifications
CWE-120, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 30, 2026CVE publishedPublication date reported by the CVE source.
  2. May 30, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.11

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

ArmCode · Arm Whoisversion=3.11

Published CVSS scores

6.9VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
6.2VulnCheckCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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