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CVE-2026-111340

CVE-2026-111340

validatingZero is analyzing and reversing it now.

EUVD-2026-124834 ↗

no check availablenot proven exploitable
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.
Citrix NetScaler ADC < 14.1-73.57; < 13.1-64.39; >= 0, < 14.1-73.58 FIPS; >= 0, < 13.1-37.293 FIPs and NDcPP
fixed in 14.1-73.57, 13.1-64.39, 14.1-73.58 FIPS, 13.1-37.293 FIPs and NDcPP
ETK-2026-4347Zero's internal tracking ID, independent of the CVE number., permanent identifier
cvss8.7cna vendorCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
–running
startingcurrent stage
timeline
0 = cve.org publication
trigger signal (cve.org) +0h
0
+2h
+4h
+6h
+8h
+10h
+12h

description

Citrix NetScaler ADC and NetScaler Gateway contain a memory overflow in knowledge-based authentication (KBA). An attacker may cause denial of service or other unpredictable behavior where the affected KBA functionality is in use. The available evidence does not specify additional authentication or access prerequisites.

Still under analysis: more detail becomes available as the pipeline runs.

mitigation

Upgrade NetScaler ADC to 14.1-73.57, 13.1-64.39, 14.1-73.58 FIPS, or 13.1-37.293 FIPS/NDcPP, as applicable. Upgrade NetScaler Gateway to 14.1-73.57 or 13.1-64.39.

fixed in 14.1-73.57, 13.1-64.39, 14.1-73.58 FIPS, 13.1-37.293 FIPs and NDcPP

check
building now
exploit
not yet
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.
–
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.
–
agent run time
–
cve.org record, t = 0The moment cve.org publishes the CVE in full.
2026-11-13 03:07Z
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

Run in progress: no artifact yet.

source signals

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

  1. 2026-11-13 03:07Z
    cve_org: trigger signal, started the run
    https://www.cve.org/CVERecord?id=CVE-2026-111340

this entry in the feed

GET /api/v1/feed/CVE-2026-111340

{
  "etk_id": "ETK-2026-4347",
  "cve_id": "CVE-2026-111340",
  "display_id": "CVE-2026-111340",
  "ghsa_id": null,
  "euvd_id": "EUVD-2026-124834",
  "status": "in_pipeline",
  "anchor_state": "anchored",
  "title": "KBA memory overflow in NetScaler ADC and Gateway",
  "summary": "Citrix NetScaler ADC and NetScaler Gateway contain a memory overflow in knowledge-based authentication (KBA). An attacker may cause denial of service or other unpredictable behavior where the affected KBA functionality is in use. The available evidence does not specify additional authentication or access prerequisites.",
  "mitigation": "Upgrade NetScaler ADC to 14.1-73.57, 13.1-64.39, 14.1-73.58 FIPS, or 13.1-37.293 FIPS/NDcPP, as applicable. Upgrade NetScaler Gateway to 14.1-73.57 or 13.1-64.39.",
  "vendor": "Citrix",
  "product": "NetScaler ADC",
  "affected": [
    {
      "affected_notes": [
        ">= 0, < 14.1-73.58 FIPS",
        ">= 0, < 13.1-37.293 FIPs and NDcPP"
      ],
      "affected_ranges": [
        ">= 0, < 14.1-73.57",
        ">= 0, < 13.1-64.39"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "14.1-73.57",
        "13.1-64.39",
        "14.1-73.58 FIPS",
        "13.1-37.293 FIPs and NDcPP"
      ],
      "package_name": "NetScaler ADC",
      "purl": null
    },
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 0, < 14.1-73.57",
        ">= 0, < 13.1-64.39"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "14.1-73.57",
        "13.1-64.39"
      ],
      "package_name": "NetScaler Gateway",
      "purl": null
    }
  ],
  "cwes": null,
  "cvss_score": 8.7,
  "cvss_src": "cna_vendor",
  "cvss_vector": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
  "epss_score": null,
  "epss_percentile": null,
  "epss_asof": null,
  "automation": null,
  "check": false,
  "check_confidence_basis": null,
  "exploit": false,
  "pipeline_minutes": null,
  "t0_at": "2026-11-13T03:07:04.587000+00:00",
  "signals": {
    "trigger_signal": {
      "at": "2026-11-13T03:07:04.587000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-11-13T03:07:04.587000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-111340"
    }
  }
}

published 2026-11-13 04:42Z
last change 2026-11-13 04:56Z

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