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CVE-2026-76856— Netcore NR255-V 1.5.130703 Cross-Site Request Forgery in WAN/LAN Configuration Endpoints

Quick assessment

Affected
Netcore NR255-V
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Netcore NR255-V是中国Netcore公司的一款支持多设备联网和数据转发的路由器。 Netcore NR255-V 1.5.130703版本存在跨站请求伪造漏洞，该漏洞源于wan_config_set_cgi、wan_num_set_cgi和lan_ip_change_cgi端点存在跨站请求伪造，可能导致攻击者伪造请求诱骗已认证管理员在未经同意的情况下修改WAN或LAN网络配置。

CVSS 8.1 · High EPSS 0.19% · P9

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Netcore NR255-V 1.5.130703 affected
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I. Basic Information for CVE-2026-76856

Vulnerability Information
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Vulnerability Title
Netcore NR255-V 1.5.130703 Cross-Site Request Forgery in WAN/LAN Configuration Endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
Netcore NR255-V firmware version 1.5.130703 contains a cross-site request forgery vulnerability affecting the wan_config_set_cgi, wan_num_set_cgi, and lan_ip_change_cgi endpoints. Attackers can craft forged requests to trick authenticated administrators into modifying WAN or LAN network configuration settings without consent.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨站请求伪造(CSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Netcore NR255-V 跨站请求伪造漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Netcore NR255-V是中国Netcore公司的一款支持多设备联网和数据转发的路由器。 Netcore NR255-V 1.5.130703版本存在跨站请求伪造漏洞，该漏洞源于wan_config_set_cgi、wan_num_set_cgi和lan_ip_change_cgi端点存在跨站请求伪造，可能导致攻击者伪造请求诱骗已认证管理员在未经同意的情况下修改WAN或LAN网络配置。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Netcore NR255-V 1.5.130703 -

II. Public POCs for CVE-2026-76856

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III. Intelligence Information for CVE-2026-76856

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Vendor Advisories for CVE-2026-76856 (2)

Same Patch Batch · Netcore · 2026-09-15 · 25 CVEs total

CVE-2026-76860 8.8 HIGH Netcore NR255-V 1.5.130703 Stack-Based Buffer Overflow in wake_up_set.cgi via MAC and ID T
CVE-2026-76852 8.8 HIGH Netcore NR268 1.7.121109 Forgeable Firmware Authenticity Check in mtd_write
CVE-2026-76862 8.8 HIGH Netcore NR255-V 1.5.130703 OS Command Argument Injection in Nettools tcpdump Launch Paths
CVE-2026-76861 8.8 HIGH Netcore NR255-V 1.5.130703 Stack-Based Buffer Overflow in ntools_tcpdump_start_set.cgi
CVE-2026-76853 8.1 HIGH Netcore NR268 1.7.121109 Security Check Bypass in parame_put_file.cgi
CVE-2026-76866 7.2 HIGH Netcore NR255-V 1.5.130703 OS Command Argument Injection via Unquoted DDNS Parameters
CVE-2026-76869 7.2 HIGH Netcore NR255-V 1.5.130703 Stack-Based Buffer Overflow in reboot_timer_set.cgi
CVE-2026-76870 7.1 HIGH Netcore NR255-V 1.5.130703 Out-of-Bounds Read in mtd_write Firmware Upload Validation
CVE-2026-92256 6.5 MEDIUM Netcore NR255-V 1.5.130703 IPsec PSK and RSA Key Disclosure via l2tpd_config_show.cgi Read
CVE-2026-76854 6.5 MEDIUM Netcore NR255-V 1.5.130703 Sensitive Information Disclosure via l7_web_auth_user_show.cgi
CVE-2026-76871 6.5 MEDIUM Netcore NR255-V 1.5.130703 Sensitive Information Disclosure via VPN Read Handlers
CVE-2026-76859 6.5 MEDIUM Netcore NR255-V 1.5.130703 Sensitive Information Disclosure via user_pass_show.cgi
CVE-2026-76855 6.5 MEDIUM Netcore NR255-V 1.5.130703 Cross-User Session Disclosure via Audit Endpoints
CVE-2026-76857 6.5 MEDIUM Netcore NR255-V 1.5.130703 Plaintext DDNS Credential Disclosure via ddns_wan_list_show.cgi
CVE-2026-92255 5.4 MEDIUM Netcore NR255-V 1.5.130703 Out-of-Bounds Read in filter_arp_put_file.cgi via String API Mi
CVE-2026-76867 5.4 MEDIUM Netcore NR255-V 1.5.130703 Stored Cross-Site Scripting in Route/NAT Configuration CGI Hand
CVE-2026-76872 5.4 MEDIUM Netcore NR255-V 1.5.130703 Stored Cross-Site Scripting via DHCP/ACL Management Pages
CVE-2026-92257 5.4 MEDIUM Netcore NR255-V 1.5.130703 Stored Cross-Site Scripting in L7 Content Management via eval()
CVE-2026-76873 5.2 MEDIUM Netcore NR255-V 1.5.130703 Stored Cross-Site Scripting via DHCP and ARP Hostname Fields
CVE-2026-76865 4.9 MEDIUM Netcore NR255-V 1.5.130703 NULL Pointer Dereference via Unchecked atoi() in QoS Setter Han

Showing top 20 of 25 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: NR255-V
Same vendor: Netcore
Same weakness: CWE-352