CVE-2018-25235
NetworkActiv Web Server 4.0 Username Field Buffer Overflow DoS
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.
INFO
Published Date :
March 30, 2026, 12:16 p.m.
Last Modified :
April 8, 2026, 4:35 p.m.
Remotely Exploit :
No
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | MEDIUM | [email protected] |
Solution
- Update NetworkActiv Web Server to the latest version.
- Apply vendor patches for security vulnerabilities.
- Validate input lengths in username fields.
- Monitor application for crashes.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2018-25235.
| URL | Resource |
|---|---|
| https://www.exploit-db.com/exploits/45302 | Exploit VDB Entry |
| https://www.networkactiv.com/Dev/ | Product |
| https://www.networkactiv.com/WebServer.html | Product |
| https://www.vulncheck.com/advisories/networkactiv-web-server-username-field-buffer-overflow-dos | Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2018-25235 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2018-25235
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2018-25235 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2018-25235 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Apr. 08, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Added CPE Configuration OR *cpe:2.3:a:networkactiv:web_server:*:*:*:*:*:*:*:* versions up to (excluding) 4.0 Added Reference Type VulnCheck: https://www.exploit-db.com/exploits/45302 Types: Exploit, VDB Entry Added Reference Type VulnCheck: https://www.networkactiv.com/Dev/ Types: Product Added Reference Type VulnCheck: https://www.networkactiv.com/WebServer.html Types: Product Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/networkactiv-web-server-username-field-buffer-overflow-dos Types: Third Party Advisory -
New CVE Received by [email protected]
Mar. 30, 2026
Action Type Old Value New Value 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. Added CVSS V4.0 AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Added CWE CWE-787 Added Reference https://www.exploit-db.com/exploits/45302 Added Reference https://www.networkactiv.com/Dev/ Added Reference https://www.networkactiv.com/WebServer.html Added Reference https://www.vulncheck.com/advisories/networkactiv-web-server-username-field-buffer-overflow-dos