# CVE-2026-76871: Netcore NR255-V credential disclosure in VPN components

Source: https://junglewise.ai/threats/cve-2026-76871-netcore-nr255-v-credential-disclosure-in-vpn-components  
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-2026-76871 · Severity: medium · CVSS 6.5 · Published 2026-09-15

The Netcore NR255-V router is a networking device used to manage VPN connections for remote access. A vulnerability allows authenticated attackers to directly access and extract PPTP and L2TP VPN credentials (usernames and passwords) through publicly readable web interface endpoints. An attacker with network access and login credentials could obtain all stored VPN user credentials, compromising the security of remote access and potentially enabling lateral movement into corporate networks.

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

## Quick answers

**Is CVE-2026-76871 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76871 being exploited in the wild.

**How severe is CVE-2026-76871?** 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-2026-76871?** 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-2026-76871 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-76871?** 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

This is a sensitive information disclosure vulnerability (CWE-522) affecting multiple CGI scripts and configuration endpoints in Netcore NR255-V version 1.5.130703. The vulnerable components (mod_vpn_remote/plan.json, pptpd_user_show.cgi, pptp_client_config_show.cgi, and l2tpd_user_show.cgi) fail to properly protect VPN credentials, exposing PPTP and L2TP user accounts and passwords. The attack requires network access to the router's web interface and valid authentication credentials. An attacker with router access can retrieve plaintext or insufficiently obfuscated VPN credentials used for remote access. No patch status is publicly documented; users should contact Netcore for firmware updates.

## 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-pptp-l2tp-cred-disclosure.md](https://github.com/draw-ctf/netcore-router-public-refs/blob/main/2026.08.19-netcore-nr255v-pptp-l2tp-cred-disclosure.md)
- [https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-sensitive-information-disclosure-via-vpn-read-handlers](https://www.vulncheck.com/advisories/netcore-nr255-v-1.5.130703-sensitive-information-disclosure-via-vpn-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 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 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)