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CVE-2026-88772criticalunder attackCWE-119

Memory overflow vulnerability leading to Remote Code Execution or Denial of Service

78Vexday Risk Score

Prioritize patching. It under exploitation confirmed by CISA and has a public proof of concept.

ssvc Actcvss 9.5epss 1.3%
from disclosure to weapon0 days
Published on NVDSep 27
1st PoCSep 27
CISA KEVSep 27
exploitation probability
1.3%top 31% of all CVEs
observed exploitation
yesCISA + VulnCheck
3 public exploit(s)
Action required by CISAfederal deadline: 2026-09-30

Apply 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.

In short

A memory overflow flaw in Citrix NetScaler ADC and Gateway allows attackers to execute arbitrary code or crash the system. This affects multiple versions of these network security appliances used by organizations worldwide.

Technical detail

Buffer overflow vulnerability (CWE-119) in Citrix NetScaler ADC and Gateway enables remote code execution or denial of service without authentication requirements. Affected versions: ADC before 14.1-73.37, 13.1-64.23, 14.1-73.37 FIPS, 13.1.37.279 FIPS/NDcPP; Gateway before 14.1-73.37 and 13.1-64.23. Exploitable via memory corruption to compromise system integrity and availability.

Summary generated and translated by AI from the official description.
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:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.