Buffer Overflow Vulnerability in NetworkActiv Web Server 4.0
CVE-2018-25235

6.9MEDIUM

Key Information:

Vendor

Networkactiv

Status
Networkactiv Web Server
Vendor
CVE Published:
30 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2018-25235?

The NetworkActiv Web Server version 4.0 is susceptible to a buffer overflow vulnerability found in the username field of its Security options. This flaw allows local attackers to intentionally crash the application by submitting a username string that exceeds the allocated buffer size. By leveraging this vulnerability through crafted input in the Set username interface, attackers could effectively trigger a denial of service, compromising the availability of the web server.

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Affected Version(s)

NetworkActiv Web Server 4.0 Pre-Alpha-3.7.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2018-25235 - Proof of Concept

References

https://www.exploit-db.com/exploits/45302
exploit
https://www.networkactiv.com/WebServer.html
product
https://www.networkactiv.com/Dev/
product

CVSS V4

Score:
6.9
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Victor Mondragón
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