CVE-2026-76864Network attack vector

Stored script execution via unsanitized QoS rule names

Published Sep 15, 2026 · Updated Sep 15, 2026

Stored cross-site scripting in Netcore NR255-V 1.5.130703 allows remote authenticated users to execute scripts via QoS rule names. The qos_xianz_add_cgi, qos_xianz_show_cgi, qos_filter_add_cgi, and qos_filter_show_cgi handlers pass stored names to eval() without sanitization, causing attacker-controlled script code to run when the data is processed. Access to web management and permission to create QoS rules are required; execution occurs when a later request processes the stored rule.

CVSS severityUnavailable
Unscored
EPSS probability0.19%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored cross-site scripting in Netcore NR255-V 1.5.130703 allows remote authenticated users to execute scripts via QoS rule names. The qos_xianz_add_cgi, qos_xianz_show_cgi, qos_filter_add_cgi, and qos_filter_show_cgi handlers pass stored names to eval() without sanitization, causing attacker-controlled script code to run when the data is processed. Access to web management and permission to create QoS rules are required; execution occurs when a later request processes the stored rule.

The record

CVE
CVE-2026-76864
Published
Sep 15, 2026
Updated
Sep 15, 2026
Vendor
Netcore
Product
NR255-V
Classifications
T1059.007
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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  1. Affected versionversion=1.5.130703

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Netcore · NR255-Vversion=1.5.130703

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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