# CVE-2026-108931: Netcore NR268 stored cross-site scripting in DHCP handler

Source: https://junglewise.ai/threats/cve-2026-108931-a-vulnerability-was-found-in-netcore-nr268-1-7-121109-this  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-12. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-108931 · Severity: medium · CVSS 4.3 · Published 2026-10-12

The Netcore NR268 router is used to manage networks, including DHCP client assignments and DNS settings. An attacker on the local network can inject malicious code via a DHCP hostname, which then executes in the administrator's browser when viewing the DHCP status page, potentially allowing theft of admin credentials and session hijacking.

Technologies: [Netcore NR268](https://junglewise.ai/threats/technologies/nr268). Vendors: [Netcore](https://junglewise.ai/threats/vendors/netcore).

## Quick answers

**Is CVE-2026-108931 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-108931 being exploited in the wild.

**How severe is CVE-2026-108931?** Medium severity, with a CVSS score of 4.3, published 12 October 2026.

**Which products and versions are affected?** Netcore NR268 1.7.121109.

**Is there a fix for CVE-2026-108931?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-108931 attacked?** It is attacked over the network or from the adjacent network, in a network appliance.

**Am I affected by CVE-2026-108931?** Check whether you run Netcore NR268 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The dhcp_dynamicip_show.cgi endpoint fails to properly sanitize DHCP hostnames when serializing them into pseudo-JSON, and the web UI parses the response with eval('('+data+')'), enabling stored XSS. An unauthenticated LAN client can request a DHCP lease with a malicious hostname (e.g., <svg/onload=alert(1)>), which is persisted unsanitized and executed in the administrator's browser context when the DHCP status page is opened.

## Affected products

- Netcore NR268 1.7.121109

## Timeline

- 2026-09-14: disclosed
- 2026-10-12: advisory

## References

- [https://github.com/draw-ctf/report/blob/main/NR268/2026.09.14-netcore-nr268-dhcp-dns-stored-xss.md](https://github.com/draw-ctf/report/blob/main/NR268/2026.09.14-netcore-nr268-dhcp-dns-stored-xss.md)
- [https://vuldb.com/cve/CVE-2026-108931](https://vuldb.com/cve/CVE-2026-108931)

## Related threats

- [Netcore NR268 stored XSS in DHCP Hostname Handler](https://junglewise.ai/threats/cve-2026-108932-a-vulnerability-was-determined-in-netcore-nr268-1-7-121109-this)
- [Netcore NR268 DDNS argument injection](https://junglewise.ai/threats/cve-2026-108929-a-flaw-has-been-found-in-netcore-nr268-1-7-121109-the-affected)
- [Netcore NR268 cross-site request forgery in CGI endpoint](https://junglewise.ai/threats/cve-2026-108909-a-security-flaw-has-been-discovered-in-netcore-nr268-1-7-121109)
- [Netcore NR268 authentication bypass in CGI execution](https://junglewise.ai/threats/cve-2026-108907-a-vulnerability-was-determined-in-netcore-nr268-1-7-121109)
- [Netcore NR268 out-of-bounds read in ARP filter upload](https://junglewise.ai/threats/cve-2026-108906-a-vulnerability-has-been-found-in-netcore-nr268-1-7-121109-this)