Sensitive Information Disclosure in Netcore NR255-V Firmware
CVE-2026-76857

7.1HIGH

Key Information:

Vendor

Netcore

Status
Nr255-v
Vendor
CVE Published:
15 September 2026

What is CVE-2026-76857?

The Netcore NR255-V firmware version 1.5.130703 contains a vulnerability that exposes sensitive information through the ddns_wan_list_show.cgi endpoint. Attackers who exploit this vulnerability can access plaintext DDNS credentials, compromising sensitive account information. This issue affects related components including DDNSset_cgi, IGD_GetCgiHandler, and IGD_CgiCall, posing a significant risk to affected users.

Affected Version(s)

NR255-V 1.5.130703

References

https://github.com/draw-ctf/netcore-router-public-refs/bl...
third-party-advisory
https://www.vulncheck.com/advisories/netcore-nr255-v-1.5....
third-party-advisory

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Zhou Ao
Yin Luxing
Jiang Yuxuan
Liu Xin
@Nebusec
.