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Vulnerability record · CVE-2026-76857 · published 15 September 2026

CVE-2026-76857: Insufficiently protected credentials vulnerability

Netcore NR255-V firmware version 1.5.130703 contains a sensitive information disclosure vulnerability in the ddns_wan_list_show.cgi endpoint and related DDNSset_cgi, IGD_GetCgiHandler, and IGD_CgiCall components. Attackers who reach this CGI handler can obtain plaintext DDNS credentials, exposing sensitive account information.

7.1 CVSS 4.0 High EPSS 0.36% · top 72.8% CWE-522 · Insufficiently protected credentials Deferred
7.1CVSS 4.0 base score
0.36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
17 Sep 2026Last modified by NVD

Description

Netcore NR255-V firmware version 1.5.130703 contains a sensitive information disclosure vulnerability in the ddns_wan_list_show.cgi endpoint and related DDNSset_cgi, IGD_GetCgiHandler, and IGD_CgiCall components. Attackers who reach this CGI handler can obtain plaintext DDNS credentials, exposing sensitive account information.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-ddns-cred-disclosure.md
https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-plaintext-ddns-credential-disclosure-via-ddns-wan-list-s

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Source: NIST National Vulnerability Database (record CVE-2026-76857), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.