CVE-2026-120596

waiting for further signals

GHSA-mg75-66wv-hfxw ↗EUVD-2026-115333 ↗

no check availablenot proven exploitable

cve.orgpublic pockev

Ethernut / egnite GmbH Nut/Net TCP/IP Stack Nut/OS 5.1

ETK-2026-3301, permanent identifier

cvss7.5cna vendorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

4h 38msince last run

19mAI analysis

timeline

0 = trigger signal

trigger signal (cve.org) +0hwaiting for further signals+1h28m

+4h

+6h

+8h

+10h

+12h

description

Nut/OS releases through 5.1 that include the Nut/Net TCP/IP Stack are affected. An unauthenticated remote attacker that can reach an open TCP port can make TCP-based services stop responding until the device is restarted.

mitigation

Restrict inbound TCP access to vulnerable devices to trusted networks and hosts using network filtering. Monitor for a vendor-supported update and apply it after confirming it addresses this issue.

check

exploit

automation

contextual

auth required

EPSS

–

agent run time

19m

cve.org record, t = 0

2026-11-02 17:04Z

Δ to public poc

–

Δ to kev

–

outcome

Contextual, not validated: no deterministic check could cover this one, and no technique passed our review.

source signals

Public signals that triggered or updated the pipeline. These are inputs for the deltas above.

2026-11-02 17:04Z
cve_org: trigger signal, started the run
https://www.cve.org/CVERecord?id=CVE-2026-120596

this entry in the feed

GET /api/v1/feed/CVE-2026-120596

{
  "etk_id": "ETK-2026-3301",
  "cve_id": "CVE-2026-120596",
  "display_id": "CVE-2026-120596",
  "ghsa_id": "GHSA-mg75-66wv-hfxw",
  "euvd_id": "EUVD-2026-115333",
  "status": "published",
  "anchor_state": "anchored",
  "title": "TCP option parsing denial of service in Nut/Net TCP/IP Stack",
  "summary": "Nut/OS releases through 5.1 that include the Nut/Net TCP/IP Stack are affected. An unauthenticated remote attacker that can reach an open TCP port can make TCP-based services stop responding until the device is restarted.",
  "mitigation": "Restrict inbound TCP access to vulnerable devices to trusted networks and hosts using network filtering. Monitor for a vendor-supported update and apply it after confirming it addresses this issue.",
  "vendor": "Ethernut / egnite GmbH",
  "product": "Nut/Net TCP/IP Stack",
  "affected": [
    {
      "affected_notes": [
        "Nut/OS 5.1"
      ],
      "affected_ranges": [],
      "ecosystem": null,
      "fixed_versions": [],
      "package_name": "Nut/Net TCP/IP Stack",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": "contextual",
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": 19.272890816666667,
  "t0_at": "2026-11-02T17:04:18.611000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-02T17:04:18.611000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-02T17:04:18.611000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-120596"
    }
  }
}

published 2026-11-02 18:12Z
last change 2026-11-02 20:38Z

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