CVE-2026-31985

Disabled and non-configurable TLS certificate validation in n2os-tui when connecting the Remote Collector to a Guardian or CMC, in Remote Collector before v26.2.0

Published Jul 9, 2026 CVSS 4.0 · 8.3 High EPSS < 1% KEV · Not listed
Description
When the upstream Guardian or CMC was configured in the Remote Collector via n2os-tui, the generated configuration disabled TLS certificate verification, and no option was provided to enable it. A malicious actor could perform a man-in-the-middle attack and intercept the communication between the Remote Collector and the Guardian or CMC. This could result in theft of the sync token, impersonation of the server, injection of spoofed data (such as false asset information or vulnerabilities) into the Guardian or CMC, or disruption of the data flow between the Remote Collector and the Guardian or CMC.

Remediation

Vendor Solution

Upgrade to v26.2.0 or later.


Vendor Workaround

Manually edit the "n2os.conf.user" file in the Remote Collector and remove the "!" prefix from the upstream Guardian or CMC endpoint entry to enable TLS certificate verification.

Tracking

Sign in to view the affected projects.

Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description When the upstream Guardian or CMC was configured in the Remote Collector via n2os-tui, the generated configuration disabled TLS certificate verification, and no option was provided to enable it. A malicious actor could perform a man-in-the-middle attack and intercept the communication between the Remote Collector and the Guardian or CMC. This could result in theft of the sync token, impersonation of the server, injection of spoofed data (such as false asset information or vulnerabilities) into the Guardian or CMC, or disruption of the data flow between the Remote Collector and the Guardian or CMC.
Title Disabled and non-configurable TLS certificate validation in n2os-tui when connecting the Remote Collector to a Guardian or CMC, in Remote Collector before v26.2.0
First Time appeared Nozomi Networks
Nozomi Networks remote Collector
Weaknesses CWE-671
CPEs cpe:2.3:a:nozomi_networks:remote_collector:*:*:*:*:*:*:*:*
Vendors & Products Nozomi Networks
Nozomi Networks remote Collector
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L'}

cvssV4_0

{'score': 8.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:H/VA:L/SC:L/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Nozomi
Published
Updated
Jul 9, 2026, 12:30 PM
Reserved
Mar 10, 2026, 4:14 PM
Status
Awaiting Analysis
Published
Jul 9, 2026, 8:16 AM
Modified
Oct 25, 2026, 5:10 PM