Is CVE-2026-76855 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-76855 being exploited in the wild.

How severe is CVE-2026-76855?

Medium severity, with a CVSS score of 6.5, published 15 September 2026.

Is there a fix for CVE-2026-76855?

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-2026-76855 attacked?

It is attacked over the network.

Am I affected by CVE-2026-76855?

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.

CVE-2026-76855: Netcore NR255-V sensitive information disclosure in audit endpoints

CVE-2026-76855 · Severity: medium · CVSS 6.5 · Published 2026-09-15

The Netcore NR255-V is a network router used in enterprise environments to manage connectivity and security. A flaw in its audit logging endpoints allows authenticated attackers to retrieve other users' session tokens and browsing history, potentially exposing confidential web activity and enabling account hijacking or further lateral movement within the organization.

Technologies: Netcore NR255-V. Vendors: Netcore.

Quick answers

Is CVE-2026-76855 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-76855 being exploited in the wild.
How severe is CVE-2026-76855?: 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-2026-76855?: 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-2026-76855 attacked?: It is attacked over the network.
Am I affected by CVE-2026-76855?: 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-359) in the audit endpoint handlers (l7_web_auth_log_dump_cgi.c, audit_get_cgi.c, and mod_dispatch_auth/plan.json) within Netcore NR255-V version 1.5.130703. The vulnerability requires an authenticated user to query the audit components over the network; no special privilege level or user interaction is required beyond authentication. By exploiting this flaw, an attacker can cross-reference audit logs to extract session identifiers and browsing records of other users across multiple sessions. No patch information is currently public, though this is likely to be addressed by the vendor in a future firmware release.

Affected products

Netcore NR255-V 1.5.130703

Timeline

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

References

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