# CVE-2026-92255: Netcore NR255-V out-of-bounds read in filter_arp_put_file.cgi

Source: https://junglewise.ai/threats/cve-2026-92255-netcore-nr255-v-out-of-bounds-read-in-filter-arp-put-file-cgi  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-15. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-92255 · Severity: medium · CVSS 5.4 · Published 2026-09-15

Netcore NR255-V is a residential wireless router. A vulnerability in its ARP filtering configuration handler allows an authenticated attacker to read beyond buffer boundaries in device memory. This could expose sensitive information stored in adjacent memory regions, potentially including credentials, keys, or other confidential data.

Technologies: [Netcore NR255-V](https://junglewise.ai/threats/technologies/nr255-v). Vendors: [Netcore](https://junglewise.ai/threats/vendors/netcore).

## Quick answers

**Is CVE-2026-92255 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-92255 being exploited in the wild.

**How severe is CVE-2026-92255?** Medium severity, with a CVSS score of 5.4, published 15 September 2026.

**Which products and versions are affected?** Netcore NR255-V 1.5.130703.

**Is there a fix for CVE-2026-92255?** 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-2026-92255 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-92255?** Check whether you run Netcore NR255-V 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 vulnerability is an out-of-bounds read (CWE-125) in the filter_arp_put_file.cgi component, triggered by improper use of string handling APIs that fail to properly validate buffer boundaries. An attacker with valid login credentials can craft a malicious ARP filter import request to trigger an unterminated buffer over-read, exposing adjacent memory contents. The attack requires network reachability to the router's management interface and prior authentication. No patch availability is documented in the advisory as of the publication date.

## Affected products

- Netcore NR255-V 1.5.130703

## Timeline

- 2026-09-04: disclosed
- 2026-09-15: advisory

## References

- [https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-arp-import-overread.md](https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-arp-import-overread.md)
- [https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-out-of-bounds-read-in-filter-arp-put-file-cgi-via-string-api-misuse](https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-out-of-bounds-read-in-filter-arp-put-file-cgi-via-string-api-misuse)

## Related threats

- [Netcore NR255-V stored cross-site scripting in L7 content management](https://junglewise.ai/threats/cve-2026-92257-netcore-nr255-v-stored-cross-site-scripting-in-l7-content)
- [Netcore NR255-V sensitive information disclosure in VPN configuration handlers](https://junglewise.ai/threats/cve-2026-92256-netcore-nr255-v-sensitive-information-disclosure-in-vpn)
- [Netcore NR255-V stored cross-site scripting in DHCP and ARP hostname fields](https://junglewise.ai/threats/cve-2026-76873-netcore-nr255-v-stored-cross-site-scripting-in-dhcp-and-arp)
- [Netcore NR255-V stored cross-site scripting in DHCP and ACL management](https://junglewise.ai/threats/cve-2026-76872-netcore-nr255-v-stored-cross-site-scripting-in-dhcp-and-acl)
- [Netcore NR255-V credential disclosure in VPN components](https://junglewise.ai/threats/cve-2026-76871-netcore-nr255-v-credential-disclosure-in-vpn-components)