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Medium severity · published Sep 15, 2026
CVE-2026-76858
Netcore NR255-V 1.5.130703 Stored Cross-Site Scripting via DDNS eval() in ddns_wan_list_show.cgi
4.8
CVSS
0.3%
EPSS
No
On KEV
Description
Netcore NR255-V version 1.5.130703 contains a stored cross-site scripting vulnerability in ddns_wan_list_show.cgi caused by unsafe eval() handling of DDNS data. Attackers can inject malicious script through the DDNS configuration path, leading to persistent execution when the affected page is viewed.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
NR
NR255-V · Netcore
1.5.130703 · source: vendor
Affected product
NR
NR255-V
Netcore
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-76858
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-76858
github.com
https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-ddns-stored-xss.md
www.vulncheck.com
https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-stored-cross-site-scripting-via-ddns-eval-in-ddns-wan-list-show-cgi
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