Buffer overflow in Networkactiv Web Server
CVE-2018-25235
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.2 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.002 (11.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 11th percentile — 11.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Networkactiv Web Server — versions 4.0 Pre-Alpha-3.7.2
- Networkactiv Web Server
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/45302 (Exploit, VDB Entry, exploit)
- www.networkactiv.com/WebServer.html (Product, product)
- www.networkactiv.com/Dev/ (Product, product)
- www.vulncheck.com/advisories/networkactiv-web-server-username-field-buffer-over… (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2018-25235?
- CVE-2018-25235 is a medium-severity vulnerability in Networkactiv Web Server, classified under Out-of-bounds Write. CVSS score: 6.2/10. Published 2026-03-30.
- How severe is CVE-2018-25235?
- Medium severity. CVSS v3 base score is 6.2 out of 10.