How severe is CVE-2026-88772?

No CVSS score has been assigned to CVE-2026-88772 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by CVE-2026-88772?

Affected package information for CVE-2026-88772 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2026-88772?

No fixed release is recorded for CVE-2026-88772 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.

How do I detect CVE-2026-88772 in my code and dependencies?

Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

How do I mitigate CVE-2026-88772 if there is no patch (or I can't update yet)?

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.

Is CVE-2026-88772 actively exploited in the wild?

Yes. There are 2 known exploit references for CVE-2026-88772, including . All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2026-88772?

CVE-2026-88772 has an EPSS (Exploit Prediction Scoring System) score of 1.3%, placing it in the 69th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

Is CVE-2026-88772 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2026-88772 (Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2026-09-27. CISA required all US federal civilian agencies to remediate this vulnerability by 2026-09-30. The required action was: 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. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

What type of vulnerability is CVE-2026-88772?

CVE-2026-88772 is classified as Buffer Overflow (CWE-119). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation. This is a high-impact weakness class that often enables remote code execution or data exposure.

When was CVE-2026-88772 published, and has it been updated?

CVE-2026-88772 was published on September 27, 2026 and was last updated on September 28, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV · ACTIVELY EXPLOITED

CVE-2026-88772

CVE-2026-88772 is a Buffer Overflow vulnerability. It is in CISA's Known Exploited Vulnerabilities catalog (added 2026-09-27) — treat it as actively exploited and patch now. No vendor fix is recorded yet; mitigation options are listed 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

Sep 27, 2026

Updated

Sep 28, 2026

Affected

2 products

Patched

See advisory

Exploits

2 known

Exploitation data as of Oct 5, 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 ↗

1.3%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs69th percentile — riskier than 69% of all scored CVEsHighest risk

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

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

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

Vulnerability

Detect
Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).
Remediation status
No fixed release is recorded for CVE-2026-88772 yet. Track the upstream advisory, and apply the exposure-reduction steps below in the meantime.
Mitigate without a patch
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.

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 · Impact-Aware SCA

Is CVE-2026-88772 in your dependencies?

Find it across , including transitive dependencies.

Scan my dependencies How O3 SCA works