CVE-2026-111855

validatedZero produced an exploit or a check.

GHSA-grh2-338g-6c79 ↗EUVD-2026-103208 ↗

check availableZero validated a working check for it.not proven exploitableZero has a detection check, but hasn't produced a full working exploit yet.
cve.orgpublic pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).kevAttacks confirmed in the real world.
Tektronix 3 Series MDO < 1.21.1
fixed in 1.21.1
CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
ETK-2026-1885Zero's internal tracking ID, independent of the CVE number., permanent identifier
+1.5dTTV
20mAI analysisAnalysis: how long the AI spent reversing this signal.
Check if you are vulnerable
timeline
0 = cve.org publication
trigger signal (cve.org) +0hcheck available+35h55magent stopped
0
+12h
+24h

description

Tektronix 3 Series MDO devices running versions before 1.21.1 are affected by a path traversal issue in the web management interface. A remote attacker may read files available to the application; depending on configuration, authentication may not be required.

mitigation

Upgrade affected 3 Series MDO devices to version 1.21.1. Restrict access to the web management interface to trusted administrative networks until the upgrade is complete.

fixed in 1.21.1

check
available
exploit
no
automationDeterministic: a check that runs on its own, the same request on every target. Contextual: an agentic technique that needs to be applied per target, for bugs that depend on contextual flows.
contextual
auth requiredWhether an attacker needs an account first, based on the CVSS vector's Privileges Required.
no
EPSSEstimate of the chance this CVE is exploited in the next 30 days. Refreshed daily.
0.49%41st percentile
agent run time
20m
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-10-17 02:09Z
Δ to public pocExploit code has been published by someone. Source signals can also carry a PoC (Proof of Concept).
–
Δ to kevAttacks confirmed in the real world.
–

outcome

Contextual check: a technique exists and was validated, but no deterministic check could cover this one.

source signals

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

  1. 2026-10-17 02:09Z
    cve_org: trigger signal, started the run

this entry in the feed

GET /api/v1/feed/CVE-2026-111855

{
  "etk_id": "ETK-2026-1885",
  "cve_id": "CVE-2026-111855",
  "display_id": "CVE-2026-111855",
  "ghsa_id": "GHSA-grh2-338g-6c79",
  "euvd_id": "EUVD-2026-103208",
  "status": "published",
  "anchor_state": "anchored",
  "title": "Path traversal in Tektronix 3 Series MDO web interface",
  "summary": "Tektronix 3 Series MDO devices running versions before 1.21.1 are affected by a path traversal issue in the web management interface. A remote attacker may read files available to the application; depending on configuration, authentication may not be required.",
  "mitigation": "Upgrade affected 3 Series MDO devices to version 1.21.1. Restrict access to the web management interface to trusted administrative networks until the upgrade is complete.",
  "vendor": "Tektronix",
  "product": "3 Series MDO",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 1.21.1"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "1.21.1"
      ],
      "package_name": "3 Series MDO",
      "purl": null
    }
  ],
  "cwes": [
    22
  ],
  "cvss_score": 7.5,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
  "epss_score": 0.0049,
  "epss_percentile": 0.4108,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "assessed",
  "exploit": false,
  "pipeline_minutes": 19.871071633333333,
  "t0_at": "2026-10-17T02:09:21.352000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-18T14:04:13.141991+00:00",
      "days": 1.496432754525463,
      "is_lower_bound": false,
      "measured_at": "2026-10-17T02:09:21.352000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-10-17T02:09:21.352000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-10-17T02:09:21.352000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-111855"
    }
  }
}

published 2026-10-17 13:17Z
last change 2026-10-21 05:31Z

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