NetworkActiv Web Server 4.0 contains a buffer overflow vulnerability in the username field of the Security options that allows local attackers to crash the application by supplying an excessively long string. Attackers can trigger a denial of service by entering a crafted username value exceeding the expected buffer size through the Set username interface.

Attack Vector Local

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00012.

Exploitation poc

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Networkactiv NetworkActiv Web Server affected
Version Status Constraints
4.0 Pre-Alpha-3.7.2 affected —

No data.

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Project Subscriptions

No data.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://www.exploit-db.com/exploits/45302 cve-icon cve-icon
https://www.networkactiv.com/Dev/ cve-icon cve-icon
https://www.networkactiv.com/WebServer.html cve-icon cve-icon
https://www.vulncheck.com/advisories/networkactiv-web-server-username-field-buffer-overflow-dos cve-icon cve-icon
History

Mon, 30 Mar 2026 12:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 30 Mar 2026 11:15:00 +0000

Type Values Removed Values Added
Description NetworkActiv Web Server 4.0 contains a buffer overflow vulnerability in the username field of the Security options that allows local attackers to crash the application by supplying an excessively long string. Attackers can trigger a denial of service by entering a crafted username value exceeding the expected buffer size through the Set username interface.
Title NetworkActiv Web Server 4.0 Username Field Buffer Overflow DoS
Weaknesses CWE-787
References
Metrics cvssV3_1

{'score': 6.2, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-03-30T11:23:08.378Z

Reserved: 2026-03-30T11:00:34.259Z

Link: CVE-2018-25235

cve-icon Vulnrichment

Updated: 2026-03-30T11:23:00.104Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-03-30T12:16:17.720

Modified: 2026-03-30T13:26:07.647

Link: CVE-2018-25235

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

No data.

Weaknesses