CVE-2026-88772

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

CVSS 4.0 Critical 9.5Known exploited (CISA KEV)

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

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

Key data

CVSS 4.0 Critical 9.5

Score published by NetScaler in the CVE record.

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

Attack vector: Network
The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity: High
The attacker has to evade or get around security controls that are in place, which takes target-specific work.
Attack requirements: None
The attack works without any special deployment or execution conditions.
Privileges required: None
No account or privileges are needed.
User interaction: None
No action from any user is needed.
Vulnerable system: confidentiality: High
Serious or total effect on the secrecy of data.
Vulnerable system: integrity: High
Serious or total effect on the trustworthiness of data.
Vulnerable system: availability: High
Serious or total effect on availability.
Subsequent systems: confidentiality: High
Serious or total effect on other systems' data secrecy.
Subsequent systems: integrity: High
Serious or total effect on other systems' data trustworthiness.
Subsequent systems: availability: High
Serious or total effect on other systems' availability.

Metric	Value	What it means
Attack vector	Network	The vulnerable component can be reached over a network, possibly from the Internet.
Attack complexity	High	The attacker has to evade or get around security controls that are in place, which takes target-specific work.
Attack requirements	None	The attack works without any special deployment or execution conditions.
Privileges required	None	No account or privileges are needed.
User interaction	None	No action from any user is needed.
Vulnerable system: confidentiality	High	Serious or total effect on the secrecy of data.
Vulnerable system: integrity	High	Serious or total effect on the trustworthiness of data.
Vulnerable system: availability	High	Serious or total effect on availability.
Subsequent systems: confidentiality	High	Serious or total effect on other systems' data secrecy.
Subsequent systems: integrity	High	Serious or total effect on other systems' data trustworthiness.
Subsequent systems: availability	High	Serious or total effect on other systems' availability.

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at first.org/cvss.

EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score: 0.76566 (76.6% probability)
Percentile: 99.5%
Scores of: Nov 10, 2026
Model: v2026.06.15

CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog: Citrix NetScaler Improper Restriction of Operations within the Bounds of a Memory Buffer Vulnerability
Added to the catalog: Sep 27, 2026
Federal due date: Sep 30, 2026

CISA assessment as of Sep 27, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation: Recorded by CISA as active
Automatable: no
Technical impact: total

Weakness (CWE)

CWE catalog version 5.0.

CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer

Affected products

Products listed in the CVE record, as the CNA published them.

Citrix NetScaler ADC
- affected: before 14.1-73.37
- affected: before 13.1-64.23
- affected: before 14.1-73.37 FIPS
- affected: before 13.1.37.279 FIPS and NDcPP
Citrix NetScaler Gateway
- affected: before 14.1-73.37
- affected: before 13.1-64.23

References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

support.citrix.com

Timeline

ID reservedSep 10, 2026
Added to CISA KEVSep 27, 2026
Record publishedSep 27, 2026
Record last updatedSep 28, 2026

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About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

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Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:06 UTC. Sources and licenses