# CVE-2026-92256: Netcore NR255-V sensitive information disclosure in VPN configuration handlers

Source: https://junglewise.ai/threats/cve-2026-92256-netcore-nr255-v-sensitive-information-disclosure-in-vpn  
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-2026-92256 · Severity: medium · CVSS 6.5 · Published 2026-09-15

The Netcore NR255-V router exposes stored VPN credentials (IPsec pre-shared keys and RSA encryption keys) through web-based configuration handlers. An attacker with network access can retrieve cryptographic material used to secure VPN connections, enabling unauthorized access to encrypted VPN tunnels or facilitating man-in-the-middle attacks.

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

## Quick answers

**Is CVE-2026-92256 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-92256 being exploited in the wild.

**How severe is CVE-2026-92256?** Medium severity, with a CVSS score of 6.5, published 15 September 2026.

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

**Is there a fix for CVE-2026-92256?** 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-2026-92256 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-92256?** 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

A sensitive information disclosure vulnerability exists in the l2tpd_config_show_cgi.c, ipsec_show_cgi.c, and mod_vpn_remote/plan.json read handlers within NR255-V 1.5.130703. The vulnerability allows authenticated attackers to query the l2tpd_config_show.cgi endpoint to retrieve IPsec pre-shared keys (PSK) and RSA key material in plaintext or insufficiently protected form. The attack requires network connectivity and valid authentication credentials. Successful exploitation exposes cryptographic secrets used for VPN tunnel establishment, allowing compromise of encrypted communications. A patch status has not been disclosed.

## 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-ipsec-cred-disclosure.md](https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-ipsec-cred-disclosure.md)
- [https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-ipsec-psk-and-rsa-key-disclosure-via-l2tpd-config-show-cgi-read-handlers](https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-ipsec-psk-and-rsa-key-disclosure-via-l2tpd-config-show-cgi-read-handlers)

## 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 out-of-bounds read in filter_arp_put_file.cgi](https://junglewise.ai/threats/cve-2026-92255-netcore-nr255-v-out-of-bounds-read-in-filter-arp-put-file-cgi)
- [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)