CVE-2026-75501
CVE-2026-75501
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | calix |
| Product | gs7 xgs (gs5239xg) |
| Published | Aug 21, 2026 |
| Last Updated | Aug 21, 2026 |
Stay Ahead of the Next One
Get instant alerts for calix gs7 xgs (gs5239xg)
Be the first to know when new unknown vulnerabilities affecting calix gs7 xgs (gs5239xg) are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
Affected Versions
Calix / GS7 XGS (GS5239XG)
0 ≤ Firmware EXOS/6.6.47