Threat operations/Case file
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Vulnerability threat dossier

CVE-2023-3519

citrixnetscaler application delivery controller

Unauthenticated remote code execution

VTP deterministic threat62.0of 100 · CVSS excluded

VTP analyst assessment

Citrix NetScaler unauthenticated RCE

AI-assisted analytical recommendationDoes not set factual exploitation state
AI review stateREVIEWED
AI priorityNONE
AI confidence95%
Public exploitation · VTP factKEV

Assessment

Critical unauthenticated remote code execution affecting NetScaler ADC and Gateway products. Supplied KEV context and independent ENISA EU KEV evidence establish known global exploitation.

Why it matters

  • Internet-facing delivery and gateway appliances can be compromised without credentials or user interaction.
  • CVSS 9.8 and EPSS 0.99749 indicate severe technical and predictive context, though EPSS does not prove exploitation.

Evidence

1 record references and 1 source references passed trusted post-response validation. The current deterministic record contains 1 independent evidence group.

Uncertainties

The supplied description contains no exploit-path detail, and the evidence does not state exploitation scale or techniques.

Local appliance versions, exposure, patch state, and compromise are unknown.

First-party sensor telemetry is active; no disclosure-eligible deterministic observation is currently public for this CVE. This does not mean no activity was observed.

Next watchpoint

Affected NetScaler ADC or Gateway appliances exposed to untrusted networks.

AI baseline history (2)
  1. BASELINE ASSESSED
    Citrix NetScaler unauthenticated RCEgpt-5.6-sol · high
  2. BASELINE ASSESSED
    Citrix NetScaler unauthenticated code executiongpt-5.6-sol · high
Technical severityCRITICALCVSS 9.8 · technical context
Public exploitationKEVGlobal public evidence
Exploit maturityTECHNICAL DETAILSReliability not implied
EPSS1.00100th percentile · prediction
Evidence confidence95%Strongest independent active claim
VelocitySTABLEMaterial events only
First-party telemetryFirst-party sensor telemetry is active; no disclosure-eligible deterministic observation is currently public for this CVE. This does not mean no activity was observed.
Availability: SENSOR_ONLINE_NO_MATCHING_ACTIVITY · Evidence: UNKNOWN
01

VTP deterministic assessment

Why this matters

  1. 01

    CISA KEV lists this vulnerability as known to be exploited globally.

  2. 02

    EPSS is 1.00; this is predictive context, not exploitation evidence.

  3. 03

    First-party sensor telemetry is active; no disclosure-eligible deterministic observation is currently public for this CVE. This does not mean no activity was observed.

02

Material change ledger

What changed

KEV ADDEDCISA KEV entry added
03

Claim provenance

Evidence and source independence

1publications detected
1underlying evidence chains

1 primary sources · 0 dependent secondary reports · 0 reports with unresolved independence. Repetition remains visible without multiplying confirmation.

Source claimACTIVE EXPLOITATIONENISA EU KEV LISTED
95%claim confidence
INDEPENDENTcatalog:enisa-eu-kev:CVE-2023-3519ACTIVE
Evidence
04

Event history

Threat timeline

  1. 00:0019 Jul
    KEV ADDED

    CISA KEV entry added

    CISA lists global known exploitation. This is not a VTP sensor observation.

  2. 00:0019 Jul
    ACTIVE EXPLOITATION

    ENISA EU KEV entry added

    ENISA EU KEV reports known exploitation. VTP imported this historical entry as source baseline. This is public intelligence, not a VTP sensor observation.

05

Original publications

Source record

ENISA European Vulnerability DatabaseAUTHORITATIVEINDEPENDENT

ENISA EU KEV catalog membership for CVE-2023-3519

ENISA EU KEV lists this vulnerability as known to be exploited. This is public intelligence, not a VTP sensor observation.

CVE-2023-3519
Separate evidence group
Original
06

Technical vulnerability data

Context, not threat proof

VTP threat score62.0vtp-threat-v1-public
Public exploitation30 / 30
EPSS prediction19.95 / 20
Exploit availability2.5 / 15
Source independence7.5 / 15
Intelligence recency2 / 10
Threat acceleration0 / 10
CVSS technical severityExcluded
CVSS
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-94
CPE records
4
Deterministic history records
20
Primary technical reference
07

Raw observations

First-party sensor records

First-party sensor telemetry is active; no disclosure-eligible deterministic observation is currently public for this CVE. This does not mean no activity was observed.