CVE-2023-3519

Improper Control of Generation of Code

CVSS 3.1 Critical 9.8Known exploited (CISA KEV)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Unauthenticated remote code execution

Key data

CVSS 3.1 Critical 9.8

Score published by Citrix in the CVE record.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: Low
No special conditions are needed. The attack can be repeated at will.
Privileges required: None
No account or privileges are needed.
User interaction: None
No action from any user is needed.
Scope: Unchanged
The impact stays within the vulnerable component.
Confidentiality impact: High
Serious or total effect on the secrecy of data.
Integrity impact: High
Serious or total effect on the trustworthiness of data.
Availability impact: High
Serious or total effect on availability.

Metric	Value	What it means
Attack vector	Network	The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity	Low	No special conditions are needed. The attack can be repeated at will.
Privileges required	None	No account or privileges are needed.
User interaction	None	No action from any user is needed.
Scope	Unchanged	The impact stays within the vulnerable component.
Confidentiality impact	High	Serious or total effect on the secrecy of data.
Integrity impact	High	Serious or total effect on the trustworthiness of data.
Availability impact	High	Serious or total effect on availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score: 0.99749 (99.7% probability)
Percentile: 99.95%
Scores of: Nov 10, 2026
Model: v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog: Citrix NetScaler ADC and NetScaler Gateway Code Injection Vulnerability
Added to the catalog: Jul 19, 2023
Federal due date: Aug 9, 2023
Ransomware campaigns: Known use

CISA assessment as of Jul 19, 2023

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation: Recorded by CISA as active
Automatable: no
Technical impact: total

Weakness (CWE)

CWE catalog version 5.0.

CWE-94Improper Control of Generation of Code

Affected products

Products listed in the CVE record, as the CNA published them.

Citrix NetScaler ADC
- affected: 13.1 up to before 49.13
- affected: 13.0 up to before 91.13
- affected: 13.1-FIPS up to before 37.159
- affected: 12.1-FIPS up to before 55.297
- affected: 12.1-NDcPP up to before 55.297
Citrix NetScaler Gateway
- affected: 13.1 up to before 49.13
- affected: 13.0 up to before 91.13

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

Timeline

ID reservedJul 5, 2023
Added to CISA KEVJul 19, 2023
Record publishedJul 19, 2023
Record last updatedAug 5, 2026

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About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:50 UTC. Sources and licenses