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CISA KEV · ACTIVELY EXPLOITED
HIGH severity

CVE-2026-88772 — Citrix Netscaler Application Delivery Controller

HIGH

CVE-2026-88772 is a high-severity (CVSS 8.1) Buffer Overflow vulnerability in citrix netscaler application delivery controller. It is in CISA's Known Exploited Vulnerabilities catalog (added 2026-09-27) — treat it as actively exploited and patch now. A fix is available — see the affected versions and patch details below.

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…

Published
Updated
Affected
2 products
Patched
See advisory
Exploits
2 known
Exploitation data as of Nov 11, 2026 · OSV.dev, NVD, CISA KEV, FIRST.org (EPSS)

Exploitation Status

Actively exploited in the wild

  • Confirmed by CISA's Known Exploited Vulnerabilities catalog on 2026-09-27. Federal agencies were required to remediate by 2026-09-30.
  • A successful exploit gives an attacker total control of the affected component, not partial access.

Exploitation and automatability from CISA (KEV catalog and SSVC triage) for CVE-2026-88772.

EPSS Exploitation Probability

via FIRST.org ↗
76.6%probability of exploitation in next 30 days
Very High Risk+75.27%
Lower risk than most CVEs100th percentile — riskier than 100% of all scored CVEsHighest risk
0.00%33.0%66.1%99.1%1.3%76.6%Oct 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

How urgent is this, really

Where this sits among everything scored

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

Affected Products

2 products · 7 configurations
Application
netscaler application delivery controllercitrix
≥ 14.1-66.68 && ≤ 14.1-73.37
range
Application
netscaler gatewaycitrix
≥ 14.1 && < 14.1-73.37
range
Exploits & PoCs
2

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

murrez/CVE-2026-88772

CVE-2026-88772 PoC: Citrix NetScaler ADC/Gateway DTLS memory overflow (R

⭐ 13🍴 2Sep 2026

watchtowrlabs/watchTowr-vs-Citrix-Netscaler-CVE-2026-88772

⭐ 6🍴 0Sep 2026

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every citrix netscaler application delivery controller deployment and check each version against the affected-products list above.

  2. Fix

    Apply the citrix netscaler application delivery controller security patch or hotfix for CVE-2026-88772 on the affected version, following the vendor advisory for your exact build.

  3. Workarounds

    Constrain what reaches the vulnerable code: limit the size and shape of untrusted input, isolate the affected component in a sandboxed or least-privileged process, and enable the platform's memory-safety mitigations (ASLR, stack protector, hardened allocator) so an out-of-bounds access is more likely to fail closed than to be exploitable. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

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
O3 Security · Runtime Protection

Is CVE-2026-88772 being exploited in your environment?

Detect and block the exploit chain at execution, on systems you cannot patch yet.

Protect my workloads How runtime protection works
CVE-2026-88772: Memory Corruption (KEV)