CISA KEV · Known exploitedCritical

CVE-2023-3519

Citrix NetScaler ADC, NetScaler Gateway, netscaler application delivery controller

CVE-2023-3519 affects Citrix NetScaler ADC, NetScaler Gateway, netscaler application delivery controller. Review the CVSS score, exploitation signals, affected versions, remediation status, and linked source material before making a change.

CVSS: 9.8
EPSS: 99.7%
CISA KEV: Listed
Published: 2023.07.20

PRIORITY ASSESSMENT

Immediate review

CISA has listed this vulnerability in the Known Exploited Vulnerabilities catalog.

Known exploitationConfirmed by CISA KEV

Exploit probability99.7%

Technical severityCVSS 9.8

Vulnerability overview

Affected product and versions

Product: Citrix NetScaler ADC, NetScaler Gateway, netscaler application delivery controller
Affected versions: >= 13.1 < 49.13, >= 13.0 < 91.13, >= 13.1-FIPS < 37.159, >= 12.1-FIPS < 55.297, >= 12.1-NDcPP < 55.297, >= 12.1 < 12.1-55.297, >= 13.0 < 13.0-91.13, >= 13.1 < 13.1-37.159, >= 13.1 < 13.1-49.13
Fixed versions: 12.1-55.297, 13.0-91.13, 13.1-37.159, 13.1-49.13

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

CISA required action

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Due date: 2023.08.09

1
Identify
Confirm that Citrix NetScaler ADC, NetScaler Gateway, netscaler application delivery controller and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-94
KEV added: 2023.07.19
Ransomware use: 확인됨