CVE-2026-88771
A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands
Improper input validation 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 an unauthenticated attacker to execute arbitrary commands.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands
Improper input validation 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 an unauthenticated attacker to execute arbitrary commands.
- Record
CVE-2026-88771- CVSS 4.0
- 9.5 Critical
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H - Weakness
- CWE-20
- Updated
- 2026-11-02
EUVDEUVD-2026-87958
Improper input validation 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 an unauthenticated attacker to execute arbitrary commands.
- Record
EUVD-2026-87958- CVSS 4.0
- 9.5 Critical
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H - Updated
- 2026-11-02
GitHub AdvisoriesGHSA-mx58-p288-86qp
Improper input validation vulnerability in Citrix NetScaler ADC and Citrix NetScaler Gateway. ...
Improper input validation 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 an unauthenticated attacker to execute arbitrary commands.
- Record
GHSA-mx58-p288-86qp- CVSS 4.0
- 9.5 Critical
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
CISA KEV No score
Citrix NetScaler Improper Input Validation Vulnerability
Citrix NetScaler ADC and NetScaler Gateway contain an improper input validation vulnerability that could allow an unauthenticated attacker to execute arbitrary commands.
- Record
CVE-2026-88771- Weakness
- CWE-119
- Updated
- 2026-11-02
NVD
Improper input validation 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 an unauthenticated attacker to execute arbitrary commands.
- Record
CVE-2026-88771- CVSS 4.0
- 9.5 Critical
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-20
- Updated
- 2026-11-02
Affected products
Public exploits
Links only. Every CVE stores no exploit code.
| Source | Link | Date |
|---|---|---|
| Metasploit | Citrix NetScaler Unauthenticated Login Log Command Injection (CVE-2026-88771) | 2026-09-27 |
| PoC in GitHub | watchtowrlabs/watchTowr-vs-Citrix-Netscaler-CVE-2026-88771 | 2026-09-27 |
| PoC in GitHub | ThomasPoppelgaard/netscaler-ctx697096-checker | 2026-09-28 |
| PoC in GitHub | craigsblackie/cve-2026-88771-netscaler | 2026-09-28 |
| PoC in GitHub | technion/netscaler_scanner | 2026-09-28 |
| PoC in GitHub | techupdate24/citrix-netscaler-cve-2026-88771-rce | 2026-09-28 |
| PoC in GitHub | SwiftSecur/CVE-2026-88771-HuntScript | 2026-09-29 |
| PoC in GitHub | bkchaudhari/NetScaler-CTX697096-Assessment-Script | 2026-10-01 |
| PoC in GitHub | emilstahl/pitscaler | 2026-10-01 |
| PoC in GitHub | orjanj/netscaler_threat_hunt_helper | 2026-10-01 |
| PoC in GitHub | watchtowrlabs/citrix-netscaler-cve-2026-88771-iocs | 2026-10-02 |
| PoC in GitHub | grupooruss/netscaler-defensive-checker | 2026-10-08 |
| PoC in GitHub | CompleteTech-Security/netscaler-pitscaler-cve-2026-88771-check | 2026-10-23 |
History
| Recorded | Changed | Sources |
|---|---|---|
| exploitation, exploits | ||
| first indexed | CVE List, EUVD, GitHub Advisories, CISA KEV, Metasploit, NVD, PoC in GitHub |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-88771 is a critical vulnerability (CVSS 9.5) in Citrix Netscaler, published September 27, 2026. CISA lists it as known to be exploited, since September 27, 2026. EUVD reports exploitation since September 27, 2026. Public exploit code exists. EPSS puts the chance of exploitation in the next 30 days at 81.9%, the 99th percentile. No source names a fixed version.