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CVE-2026-88777

9.8, critical

Citrix NetScaler ADC Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability

NVD (opens in a new tab) CVE.org (opens in a new tab)
CVSS
9.8, critical critical CVSS v3.1
EPSS, next 30 days
0.4% higher than 30.8% of scored CVEs
Exploitation
No public evidence
Published
27 Sept 202620 days ago

Description

Memory overflow vulnerability 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 unpredictable or erroneous behavior or Denial of Service

Details

Vendor
Citrix NetScaler
Product
ADC
Weakness
CWE-119 (opens in a new tab)
Status
Modified
Updated
29 Sept 2026
Assigner
50a63c94-1ea7-4568-8c11-eb79e7c5a2b5

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References 1

Advisories 1

The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.

Other Citrix NetScaler CVEs

Every Citrix NetScaler CVE we hold

Same vendor in what we hold, not a known link between the flaws.

  • CVE-2026-88773 Citrix NetScaler ADC HTTP Request Smuggling Vulnerability EPSS 0.4% 10, critical
  • CVE-2026-88775 Citrix NetScaler ADC Buffer Overflow Vulnerability EPSS 0.4% 9.8, critical
  • CVE-2026-88776 Citrix NetScaler ADC Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability EPSS 0.4% 9.8, critical
  • CVE-2026-88774 Citrix NetScaler ADC Improper Input Validation Vulnerability EPSS 0.2% 7.2, high
  • CVE-2026-88778 Predictable exact value from previous values vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway EPSS 0.4% 7.5, high

Beyond this page

Is CVE-2026-88777 in your network?

This page tells you how dangerous CVE-2026-88777 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.

  • EXYS7600 OCELOT

    Find it before attackers do

    Ocelot scans your network on a schedule and reports every vulnerability it finds by its CVE identifier, with its CVSS score and how many of your hosts are affected. A finding like CVE-2026-88777 comes with the devices to patch.

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  • EXYS7950 KONDRA

    Detect it if it's exploited

    Until the patch is applied, Kondra monitors your network, events and endpoints in real time. It keeps an inventory of the software installed on every endpoint, and its anomaly detection rules flag what an attacker does once inside.

    Learn more about EXYS7950 KONDRA
Check your exposure

Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 16 Oct 2026, not the live upstream state.