Vulnerability-Lookup

NN-2026:12-01

Vulnerability from csaf_nozominetworks - Published: 2026-07-07 11:00 - Updated: 2026-07-07 11:00

Summary

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

Severity

High

Notes

Risk Level for Nozomi customers: High

CVE-2026-31985

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L

CWE-671 - Lack of Administrator Control over Security

Affected products

Fixed 1 product

Product	Identifier	Version	Remediation
Nozomi Networks Remote Collector 26.2.0 Nozomi Networks / Remote Collector		26.2.0

Known affected 1 product

Product	Identifier	Version	Remediation
Nozomi Networks Remote Collector <26.2.0 Nozomi Networks / Remote Collector		vers:gem/<26.2.0	Mitigation Vendor Fix

Threats

Impact 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.

References

3 references

URL	Category
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CV…	external
https://security.nozominetworks.com/csaf/2026/nn-…	self
https://security.nozominetworks.com/NN-2026:12-01	self

Acknowledgments

Nozomi Networks Product Security team Andrea Palanca

JSON

To clipboard

{
  "document": {
    "aggregate_severity": {
      "text": "HIGH"
    },
    "category": "csaf_vex",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE"
      }
    },
    "lang": "en-US",
    "notes": [
      {
        "category": "other",
        "text": "High",
        "title": "Risk Level for Nozomi customers"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "Nozomi Networks Product Security team can be reached at prodsec@nozominetworks.com",
      "name": "Nozomi Networks Product Security",
      "namespace": "https://security.nozominetworks.com/psirt"
    },
    "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",
    "tracking": {
      "aliases": [
        "CVE-2026-31985"
      ],
      "current_release_date": "2026-07-07T11:00:00.000Z",
      "id": "NN-2026:12-01",
      "initial_release_date": "2026-07-07T11:00:00.000Z",
      "revision_history": [
        {
          "date": "2026-07-07T11:00:00.000Z",
          "number": "1",
          "summary": "Initial revision"
        }
      ],
      "status": "final",
      "version": "1"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "vers:gem/\u003c26.2.0",
                "product": {
                  "name": "Nozomi Networks Remote Collector \u003c26.2.0",
                  "product_id": "CSAFPID-0001"
                }
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              {
                "category": "product_version",
                "name": "26.2.0",
                "product": {
                  "name": "Nozomi Networks Remote Collector 26.2.0",
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        "name": "Nozomi Networks"
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      "acknowledgments": [
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          "names": [
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      "cwe": {
        "id": "CWE-671",
        "name": "Lack of Administrator Control over Security"
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          "text": "NN-2026:12-01"
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      "notes": [
        {
          "category": "summary",
          "text": "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.",
          "title": "Vulnerability summary"
        }
      ],
      "product_status": {
        "fixed": [
          "CSAFPID-0002"
        ],
        "known_affected": [
          "CSAFPID-0001"
        ]
      },
      "references": [
        {
          "category": "external",
          "summary": "Mitre CVE entry",
          "url": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-31985"
        },
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://security.nozominetworks.com/csaf/2026/nn-2026_12-01.json"
        },
        {
          "category": "self",
          "summary": "Human-readable advisory.",
          "url": "https://security.nozominetworks.com/NN-2026:12-01"
        }
      ],
      "remediations": [
        {
          "category": "mitigation",
          "details": "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.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        },
        {
          "category": "vendor_fix",
          "details": "Upgrade Remote Collector to v26.2.0 or later.",
          "product_ids": [
            "CSAFPID-0001"
          ]
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L",
            "version": "3.1"
          },
          "products": [
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      "threats": [
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          "category": "impact",
          "details": "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"
    }
  ]
}

CVE-2026-31985 (GCVE-0-2026-31985)

Vulnerability from cvelistv5 – Published: 2026-07-09 07:23 – Updated: 2026-07-09 12:30

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

Summary

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.

Severity

8.3 (High)


                        
                          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

8.1 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:H/A:L

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-671 - Lack of administrator control over security

Assigner

Nozomi

References

1 reference

URL	Tags
https://security.nozominetworks.com/NN-2026:12-01

Impacted products

1 product

Vendor	Product	Version
Nozomi Networks	Remote Collector	Affected: 0 , < 26.2.0 (semver)

Date Public

2026-07-07 07:00

Credits

This issue was found by Andrea Palanca of Nozomi Networks Product Security team during an internal investigation.

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

NN-2026:12-01

CVE-2026-31985 (GCVE-0-2026-31985)

Tags

Sightings

Nomenclature