Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and…
Priority MEDIUM 50CWE-119Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA. Impact type from CWE-119 and the CVSS impact.
Summary
Buffer overflow on Dasan GPON ONT WiFi Router H640X 12.02-01121 2.77p1-1124 and 3.03p2-1146 devices allows remote attackers to execute arbitrary code via a long POST request to the login_action function in /cgi-bin/login_action.cgi (aka cgipage.cgi).
Why it matters now
EPSS 0.05045 92nd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:dasannetworks:h640x_firmware:2.77p1-1124:*:*:*:*:*:*:* | 2.77p1-1124 | Vulnerable | Dasan Networks |
| cpe:2.3:o:dasannetworks:h640x_firmware:3.03p2-1146:*:*:*:*:*:*:* | 3.03p2-1146 | Vulnerable | Dasan Networks |
| cpe:2.3:o:dasannetworks:h640x_firmware:12.02-01121:*:*:*:*:*:*:* | 12.02-01121 | Vulnerable | Dasan Networks |
| cpe:2.3:h:dasannetworks:h640x:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Dasan Networks |
- cpe:2.3:o:dasannetworks:h640x_firmware:2.77p1-1124:*:*:*:*:*:*:* Versions 2.77p1-1124 Vulnerable ·Dasan Networks
- cpe:2.3:o:dasannetworks:h640x_firmware:3.03p2-1146:*:*:*:*:*:*:* Versions 3.03p2-1146 Vulnerable ·Dasan Networks
- cpe:2.3:o:dasannetworks:h640x_firmware:12.02-01121:*:*:*:*:*:*:* Versions 12.02-01121 Vulnerable ·Dasan Networks
- cpe:2.3:h:dasannetworks:h640x:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Dasan Networks
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2017-18046
- 2026-10-03 Alias added: GHSA-grjw-qj2p-c4f5
References
Sources
- CVE-2017-18046 · CVE Program
- CVE-2017-18046 · NVD
- FIRST EPSS
- GHSA-grjw-qj2p-c4f5 · 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