NetworkActiv Web Server 4.0 Username Field Buffer Overflow DoS
Priority MEDIUM 64CWE-787Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00225 13th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Networkactiv | NetworkActiv Web Server | 4.0 Pre-Alpha-3.7.2 | — | No fix listed | CNA |
- NetworkActiv Web Server VendorNetworkactiv Affected 4.0 Pre-Alpha-3.7.2 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:networkactiv:web_server:*:*:*:*:*:*:*:* | before 4.0 | Vulnerable | Networkactiv |
- cpe:2.3:a:networkactiv:web_server:*:*:*:*:*:*:*:* Versions before 4.0 Vulnerable ·Networkactiv
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2018-25235
- 2026-10-03 Alias added: GHSA-x4g8-cm9x-f937
References
Exploit 1
Sources
- CVE-2018-25235 · CVE Program
- CVE-2018-25235 · NVD
- FIRST EPSS
- GHSA-x4g8-cm9x-f937 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences