CVE-2026-76864 Netcore NR255-V 1.5.130703 Stored Cross-Site Scripting via Unescaped QoS Rule Names
Attackers can inject persistent scripts via QoS rule names, leading to code execution when viewed by administrators.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-76864?
CVE-2026-76864 is a medium-severity cross-site scripting vulnerability in Netcore NR255-V, published on 15 Sep 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
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.'
Weakness: CWE-79
Which versions are affected by CVE-2026-76864?
How do I fix CVE-2026-76864?
No fix has been published for CVE-2026-76864 yet. Limit exposure of the affected software until one is available.
Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.
Is CVE-2026-76864 being exploited?
There is no known exploitation of CVE-2026-76864 in the wild and no public exploit code.
Sources
Also known as GHSA-pgr6-p5qf-2942.