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CVE-2026-76855— Netcore NR255-V 1.5.130703 Cross-User Session Disclosure via Audit 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版本存在信息泄露漏洞，该漏洞源于审计端点l7_web_auth_log_dump_cgi.c、audit_get_cgi.c和mod_dispatch_auth/plan.json存在敏感信息泄露问题，攻击者可查询这些审计组件获取其他用户的会话和浏览历史数据。

CVSS 6.5 · Medium EPSS 0.39% · P33 Updated Sep 17, 2026

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

Vendor	Product	Version Range	Status
Netcore	NR255-V	`1.5.130703`	affected

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I. Basic Information for CVE-2026-76855

Vulnerability Information

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Vulnerability Title

Netcore NR255-V 1.5.130703 Cross-User Session Disclosure via Audit Endpoints

Source: CVE Program / CVE List V5

Vulnerability Description

Netcore NR255-V version 1.5.130703 contains a sensitive information disclosure vulnerability in the audit endpoints handled by l7_web_auth_log_dump_cgi.c, audit_get_cgi.c, and mod_dispatch_auth/plan.json. Attackers can query these audit components to obtain other users' session and browsing history data across sessions.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

侵犯隐私

Source: CVE Program / CVE List V5

Vulnerability Title

Netcore NR255-V 信息泄露漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

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-2026-76855

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-76855

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Vendor Advisories for CVE-2026-76855 (1)

🔗 Netcore NR255-V 1.5.130703 Cross-User Session Disclosure via Audit Endpoints | Advisories | VulnCheck third-party-advisory

Other References for CVE-2026-76855 (1)

🔗 netcore-router-public-refs/2026.08.19-netcore-nr255v-audit-endpoint-disclosure.md at main · draw-ctf/netcore-router-public-refs · GitHub third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-76855

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-2026-76856	8.1 HIGH	Netcore NR255-V 1.5.130703 Cross-Site Request Forgery in WAN/LAN Configuration Endpoints
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-2026-76857	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-359