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CVE-2023-3519 (GCVE-0-2023-3519)

Vulnerability from cvelistv5 – Published: 2023-07-19 17:51 – Updated: 2026-08-05 03:55
VLAI CISA ENISA Shadowserver Previdian
Summary
Unauthenticated remote code execution
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: active Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2023-07-19 00:00 UTC
CWE
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
Vendor Product Version CPE status
Citrix NetScaler ADC Affected: 13.1 , < 49.13 (patch)
Affected: 13.0 , < 91.13 (patch)
Affected: 13.1-FIPS , < 37.159 (patch)
Affected: 12.1-FIPS , < 55.297 (patch)
Affected: 12.1-NDcPP , < 55.297 (patch)
guessed Create a notification for this product.
Citrix NetScaler Gateway Affected: 13.1 , < 49.13 (patch)
Affected: 13.0 , < 91.13 (patch)
guessed Create a notification for this product.
CISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 1dc57b8d-60ca-4a5b-b6dd-b5ffe274915d

Vulnerability ID: CVE-2023-3519

Status: Confirmed

Status Updated: 2023-07-19 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-07-19
Asserted: 2023-07-19
Scope
Notes: KEV entry: Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability | Affected: Citrix / NetScaler ADC and NetScaler Gateway | Description: Citrix NetScaler ADC and NetScaler Gateway contains a code injection vulnerability that allows for unauthenticated remote code execution. | Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. | Due date: 2023-08-09 | Known ransomware campaign use (KEV): Known | Notes (KEV): https://support.citrix.com/article/CTX561482/citrix-adc-and-citrix-gateway-security-bulletin-for-cve20233519-cve20233466-cve20233467; https://nvd.nist.gov/vuln/detail/CVE-2023-3519
Evidence

Type: Vendor Report

Signal: Successful Exploitation

Confidence: 80%

Source: cisa-kev

Details
Cwes CWE-94
Feed CISA Known Exploited Vulnerabilities Catalog
Product NetScaler ADC and NetScaler Gateway
Due Date 2023-08-09
Date Added 2023-07-19
Vendorproject Citrix
Vulnerabilityname Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability
Knownransomwarecampaignuse Known
References
Created: 2026-02-02 12:26 UTC | Updated: 2026-02-06 07:17 UTC
ENISA
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5873e633-6601-4ca3-a6df-21ceb6144ce2

Vulnerability ID: CVE-2023-3519

Status: Confirmed

Status Updated: 2025-01-23 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2025-01-23
Asserted: 2025-01-23
Scope
Notes: Affected: Citrix / Citrix ADC and Citrix Gateway | Exploitation type: ransomware | Origin source: cnw
Evidence

Type: Csirt Report

Signal: Confirmed Compromise

Confidence: 75%

Source: enisa-cnw-kev

Details
Cwes -
Euvd EUVD-2023-44176
Notes -
Catalog ENISA / EU CSIRTs Network (CNW) KEV CSV
Product Citrix ADC and Citrix Gateway
Datereported 23/01/25
Originsource cnw
Vendorproject Citrix
Exploitationtype ransomware
Vulnerabilityname -
Threatactorsexploiting -
References
Created: 2026-02-02 12:25 UTC | Updated: 2026-02-06 07:17 UTC
Shadowserver
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 4639144a-7403-4411-944e-f04bfe11524d

Vulnerability ID: CVE-2023-3519

Status: Confirmed

Status Updated: 2026-07-13 00:00 UTC

Exploited: Yes

Characteristics
Severity: 98.0
Timestamps
First Seen: 2023-10-24
Asserted: 2023-10-24
Last Seen: 2026-07-13
Scope
Asset Exposure: ['internet-facing']
Notes: Affected: Citrix / Citrix ADC and Citrix Gateway | Class: app-delivery-controller | Severity: Critical (CVSS 9.8) | IoT: no | In CISA KEV: yes | Honeypot connections on 2026-07-13: 2
Evidence

Type: Honeypot

Signal: In The Wild Attempts

Confidence: 70%

Source: shadowserver

Details
1D 1
Iot no
Feed Shadowserver Foundation honeypot/exploited-vulnerabilities
Type http-scan
Class app-delivery-controller
7D Avg 0
Vendor Citrix
30D Avg 0
90D Avg 0
Product Citrix ADC and Citrix Gateway
Cisa Kev yes
Connections 2
Observation Date 2026-07-13
Vulnerability Class CVSS
Vulnerability Score 9.8
Vulnerability Severity Critical
References
Created: 2026-06-30 09:23 UTC | Updated: 2026-07-15 01:01 UTC
Previdian
Known Exploited Vulnerability - GCVE BCP-07 Compliant
KEV entry ID: 5537efed-06bb-4769-a17c-bb633aa239b7

Vulnerability ID: CVE-2023-3519

Status: Confirmed

Status Updated: 2023-07-19 00:00 UTC

Exploited: Yes

Timestamps
First Seen: 2023-07-19
Asserted: 2023-07-19
Scope
Notes: KEVIntel entry: Unauthenticated remote code execution | Affected: Citrix / NetScaler ADC, NetScaler Gateway | CVSS: 9.8 (CRITICAL) | Used in malware: yes | Not yet in CISA KEV: False
Evidence

Type: Public Report

Signal: Confirmed Compromise

Confidence: 70%

Source: kevintel

Details
Feed KEVIntel (kevintel.com)
Title Unauthenticated remote code execution
Vendor Citrix
Product NetScaler ADC, NetScaler Gateway
Added Date 2023-07-19T00:00:00.000Z
Cvss Score 9.8
Epss Score None
Cvss Severity CRITICAL
Epss Percentile None
Used In Malware yes
Ahead Of Cisa Kev None
Not Yet In Cisa Kev False
References
Created: 2026-06-23 14:05 UTC | Updated: 2026-07-10 06:14 UTC
Show details on NVD website
To clipboard 

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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.