Netcore NR255-V 1.5.130703 QoS Rule QoS rule name injection

Summaryinfo

A vulnerability marked as problematic has been reported in Netcore NR255-V 1.5.130703. This issue affects the function qos_xianz_add_cgi/qos_xianz_show_cgi/qos_filter_add_cgi/qos_filter_show_cgi of the component QoS Rule Handler. This manipulation of the argument QoS rule name causes injection. This vulnerability is tracked as CVE-2026-76864. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in Netcore NR255-V 1.5.130703. Affected by this vulnerability is the function qos_xianz_add_cgi/qos_xianz_show_cgi/qos_filter_add_cgi/qos_filter_show_cgi of the component QoS Rule Handler. The manipulation of the argument QoS rule name with an unknown input leads to a injection vulnerability. The CWE definition for the vulnerability is CWE-74. The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

NR255-V version 1.5.130703 fails to sanitize QoS rule names before they are parsed via eval() in qos_xianz_add_cgi, qos_xianz_show_cgi, qos_filter_add_cgi, and qos_filter_show_cgi handlers. An attacker can inject persistent script code through crafted QoS rule name input that executes when the stored data is later processed by the affected handlers.'

It is possible to read the advisory at github.com. This vulnerability is known as CVE-2026-76864 since 08/19/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are required for exploitation. It demands that the victim is doing some kind of user interaction. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/16/2026). The attack technique deployed by this issue is T1055 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Netcore

Name

• NR255-V

Version

• 1.5.130703

CPE 2.3info

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CPE 2.2info

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