CVE-2018-25235

Name: CVE-2018-25235
Creator: NVD / NIST
Published: 2026-03-30T12:16:17.72+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.9/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2018-25235 is a medium-severity vulnerability rated 6.9/10 on the CVSS scale. 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.. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

5.5/10

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

6.9/10

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/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

EPSS Probability

0.22%

12.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Networkactiv	Web Server	< 4.0

References

https://www.exploit-db.com/exploits/45302Exploit, VDB Entry
https://www.networkactiv.com/Dev/Product
https://www.networkactiv.com/WebServer.htmlProduct
https://www.vulncheck.com/advisories/networkactiv-web-server-username-field-buffer-overflow-dosThird Party Advisory

Timeline

Published: Mar 30, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2018-25235?

How severe is CVE-2018-25235?

CVE-2018-25235 has a CVSS score of 6.9/10 (MEDIUM severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2018-25235?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-25235?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST