CVE-2026-88779
HighExploitedPublic exploitImproper Restriction of Operations within the Bounds of a Memory Buffer in NetScaler ADC and NetScaler Gateway
Published Oct 4, 2026 · Updated Oct 5, 2026 · Also known as EUVD-2026-92065, GHSA-56r3-m27m-8p62
Key Facts
Patch immediately- CVE-2026-88779 is a high-severity vulnerability (CVSS 8.7 v4) affecting Netscaler Application Delivery Controller (Citrix), Netscaler Gateway (Citrix).
- It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 2, 2026. Public exploit code is available.
- EPSS estimates a 0.6% probability of exploitation in the next 30 days.
- Fixed versions are available, including Netscaler Application Delivery Controller 13.1-37.282, Netscaler Application Delivery Controller 13.1-64.28, Netscaler Application Delivery Controller 14.1-73.41.
- Brandefense priority: patch immediately, because it is listed as exploited in the wild.
CVSS v4
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
EPSS (30-day exploit likelihood)
0.6%
Exploited in the wild
Yes
4 catalog listings
Public exploit code
Available
Proof-of-concept or weaponized module
Get the full CVE-2026-88779 brief as a PDF
Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.
Description
Vulnerability in NetScaler ADC and NetScaler Gateway.
This issue affects ADC: before 14.1-73.41, before 13.1-64.28, before 14.1-73.41 FIPS, and before 13.1-37.282; Gateway: before 14.1-73.41 and before 13.1-64.28.
Known-Exploited Catalog Listings
| Catalog | Added | Remediation due | Ransomware use |
|---|---|---|---|
| CISA KEV | Oct 4, 2026 | Oct 7, 2026 | Not reported |
| Industry KEV feed | Oct 3, 2026 | Oct 7, 2026 | Not reported |
| CIRCL KEV | Oct 2, 2026 | Oct 7, 2026 | Not reported |
| ENISA EUVD | Oct 2, 2026 | n/a | Not reported |
Required action: 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.
Affected Products
8 affected entries in total| Product | Affected versions | Fixed in |
|---|---|---|
| Netscaler Application Delivery ControllerCitrix | See advisory | 13.1-64.28 |
| Netscaler GatewayCitrix | See advisory | 13.1-64.28 |
Patched Releases
Netscaler Application Delivery Controller
13.1-37.282, 13.1-64.28, 14.1-73.41, 14.1-73.41 FIPS
Netscaler Gateway
13.1-64.28, 14.1-73.41
Timeline
Added to CIRCL KEV
Oct 2, 2026
Added to ENISA EUVD
Oct 2, 2026
Added to Industry KEV feed
Oct 3, 2026
Publicly disclosed
Oct 4, 2026
Added to CISA KEV
Oct 4, 2026
Last updated
Oct 5, 2026
Weakness Type
- CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer
References
FAQ
Common Questions.
Vulnerability in NetScaler ADC and NetScaler Gateway.
Affected: Netscaler Application Delivery Controller (Citrix); Netscaler Gateway (Citrix). The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Oct 2, 2026.
Yes. It was added on Oct 4, 2026 with a federal remediation due date of Oct 7, 2026.
Public exploit code is available.
Fixed versions are available, including Netscaler Application Delivery Controller 13.1-37.282, Netscaler Application Delivery Controller 13.1-64.28, Netscaler Application Delivery Controller 14.1-73.41.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.
Is CVE-2026-88779 Running On Your Attack Surface?
Brandefense maps vulnerabilities like this one to your internet-facing assets and tells you exactly where to patch.
Request A Demo