CVE-2026-75501
Summary
| CVE | CVE-2026-75501 |
|---|---|
| State | PUBLISHED |
| Assigner | certcc |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-21 15:16:47 UTC |
| Updated | 2026-08-21 16:18:17 UTC |
| Description | A vulnerability in the Calix EXOS firmware for the GS7 XGS (GS5239XG) residential router allows unauthenticated remote attackers to modify NAT port‑forwarding rules via the UPnP WANIPConnection service. The device exposes the MiniUPnPd control endpoint on the WAN interface on TCP port 5000 without access controls. A remote attacker can send crafted SOAP requests to add, delete, or enumerate port mappings, or to query the external IP address, without authentication. Successful exploitation may enable bypass of the firewall/NAT boundary and exposure of internal LAN services to the public internet. |
Risk And Classification
Problem Types: CWE-306 Missing Authentication for Critical Function
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Calix | GS7 XGS GS5239XG | affected Firmware EXOS/6.6.47 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| kb.cert.org/vuls/id/756733 | [email protected] | kb.cert.org | |
| www.kb.cert.org/vuls/id/756733 | af854a3a-2127-422b-91ae-364da2661108 | www.kb.cert.org | |
| drkq.github.io/security-research/calix-vu756733 | [email protected] | drkq.github.io | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.