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PatchSiren cyber security CVE debrief

CVE-2026-108931 Netcore CVE debrief

A vulnerability was found in Netcore NR268 1.7.121109, affecting the DHCP Handler component's eval function in dhcp_dynamicip_show.cgi. The manipulation of the Hostname argument results in cross-site scripting, allowing for remote attacks. Defenders should assess exposure and prioritize verification of the DHCP Handler component. This vulnerability has been made public and could be used. The attack may be launched remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

Vendor
Netcore
Product
NR268
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-12
Original CVE updated
2026-10-12
Advisory published
2026-10-12
Advisory updated
2026-10-12

Who should care

Defenders responsible for Netcore NR268 devices, particularly those using version 1.7.121109, should assess exposure and prioritize verification of the DHCP Handler component. Security teams and vulnerability management teams should review the CVE record and assess the potential impact on their organizations. Operators of Netcore NR268 devices should verify exposure and implement compensating controls if necessary.

Why it matters

Defenders should care about CVE-2026-108931 because it affects Netcore NR268 devices, particularly version 1.7.121109, and allows for remote cross-site scripting attacks. Verification of exposure and implementation of compensating controls are crucial.

  • Potential for remote cross-site scripting attacks
  • Need for verification of exposure in Netcore NR268 devices
  • Priority for implementing compensating controls

Technical summary

The vulnerability affects the eval function of the dhcp_dynamicip_show.cgi file in the DHCP Handler component of Netcore NR268 version 1.7.121109. The manipulation of the Hostname argument can result in cross-site scripting. The attack can be launched remotely. The vulnerability has been made public, and defenders should prioritize verifying exposure and assessing the DHCP Handler component for potential vulnerabilities. The CVE record provides additional technical details about the vulnerability. However, the exact technical impact and potential exploitability are not fully detailed.

Defensive priority

Defenders should prioritize verifying exposure of Netcore NR268 devices, particularly version 1.7.121109, and assess the DHCP Handler component for potential cross-site scripting vulnerabilities.

Recommended defensive actions

  • Verify exposure of Netcore NR268 devices, particularly version 1.7.121109
  • Assess the DHCP Handler component for potential cross-site scripting vulnerabilities
  • Implement compensating controls to prevent exploitation
  • Review vendor guidance for patching or mitigation
  • Conduct an inventory of affected assets
  • Monitor for suspicious activity related to the vulnerability
  • Track exceptions and retest remediated assets

Evidence notes

The CVE record and source item provide details about the vulnerability, including its existence in Netcore NR268 version 1.7.121109 and the potential for remote cross-site scripting attacks. The source item provides additional context about the vulnerability. However, the exact scope of affected systems and potential impact are not detailed. Defenders should verify exposure and review the CVE record for further information.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-108931 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-108931

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-108931 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-108931

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • Netcore NR268 DHCP dhcp_dynamicip_show.cgi eval cross site scripting

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/108xxx/CVE-2026-108931.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/vuln/416755

    Supplemental source - vdb-entry, technical-description

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/vuln/416755/cti

    Supplemental source - signature, permissions-required

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/cve/CVE-2026-108931

    Supplemental source - third-party-advisory

  • Source reference

    Unverified legacy reference

    URL: https://vuldb.com/submit/977180

    Supplemental source - third-party-advisory

  • Source reference

    Unverified legacy reference

    URL: https://github.com/draw-ctf/report/blob/main/NR268/2026.09.14-netcore-nr268-dhcp-dns-stored-xss.md

    Supplemental source - exploit

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.