Critical 9.5Known exploited (CISA KEV)Published Sep 27, 2026

CVE-2026-88772Memory overflow vulnerability leading to Remote Code Execution or Denial of Service

Updated under an hour ago (Oct 27, 2026, 12:30 PM ET)

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It affects Citrix NetScaler ADC and 3 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Sep 27, 2026; federal agencies had to remediate by Sep 30, 2026. Treat that date as your deadline.

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Every CVE for Citrix NetScaler ADC

Exploited in the last 30 days

Vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. This issue affects ADC: before 14.1-73.37, before 13.1-64.23, before 14.1-73.37 FIPS, and before 13.1.37.279 FIPS and NDcPP; Gateway: before 14.1-73.37 and before 13.1-64.23 leading to Remote Code Execution or Denial of Service

CVSS: 9.5 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
Weakness (CWE): CWE-119
Known exploited: Added to CISA KEV Sep 27, 2026; federal remediation due Sep 30, 2026Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
EPSS (exploitation in the next 30 days): 78.16% (percentile 100)
Assigned by: NetScaler
NVD analysis: Analyzed
Record last updated: Sep 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Citrix NetScaler ADC citrix_netscaler:adc (from the name)	before 14.1-73.37; before 13.1-64.23; before 14.1-73.37 FIPS; before 13.1.37.279 FIPS and NDcPP	CNA record
Citrix NetScaler Gateway citrix_netscaler:gateway (from the name)	before 14.1-73.37; before 13.1-64.23	CNA record
citrix netscaler_application_delivery_controller citrix:netscaler_application_delivery_controller	from 13.1 before 13.1-64.23; from 13.1 before 13.1.37.279; from 13.1 before 13.1.37.279; from 14.1 before 14.1-73.37; from 14.1-66.68 through 14.1-73.37	NVD
citrix netscaler_gateway citrix:netscaler_gateway	from 13.1 before 13.1-64.23; from 14.1 before 14.1-73.37	NVD

References

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096&articleTitle=Citrix_NetScaler_ADC_and_Citrix_NetScaler_Gateway_Security_Bulletin_for_CVE_2026_88771_CVE_2026_88772_CVE_2026_88773_CVE_2026_88774_CVE_2026_88775_CVE_2026_88776_CVE_2026_88777_and_CVE_2026_88778	vendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-88772	us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.