CVE-2019-25591Public exploit

Application crash via oversized registration code

Published Mar 22, 2026 · Updated Mar 22, 2026

Buffer overflow in Nsasoft DNSS Domain Name Search Software 2.1.8 allows local users to crash the application via a registration code. Registration-code handling accepts a 300-character string in the Register menu's Name/Key field and writes beyond the intended buffer. Exploitation requires local GUI access and manual submission of the crafted value; the demonstrated consequence is an application crash, not code execution or system shutdown.

CVSS severity6.9
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Buffer overflow in Nsasoft DNSS Domain Name Search Software 2.1.8 allows local users to crash the application via a registration code. Registration-code handling accepts a 300-character string in the Register menu's Name/Key field and writes beyond the intended buffer. Exploitation requires local GUI access and manual submission of the crafted value; the demonstrated consequence is an application crash, not code execution or system shutdown.

The record

CVE
CVE-2019-25591
Published
Mar 22, 2026
Updated
Mar 22, 2026
Vendor
Nsasoft
Product
DNSS Domain Name Search Software
Classifications
CWE-787, T1499.004
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 22, 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=2.1.8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Nsasoft · DNSS Domain Name Search Softwareversion=2.1.8

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-787Out-of-bounds Write
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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