CVE-2026-88771A remote code execution vulnerability exists due to improper input validation, which can allow an unauthenticated attacker to execute arbitrary commands
Updated under an hour ago ()
Does this affect you?
It affects Citrix NetScaler ADC and 3 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Sep 27, 2026; federal agencies had to remediate by Sep 30, 2026. Treat that date as your deadline.
Do this next
Free account, 1 product
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.
- CVSS
- 9.5 CRITICAL (v4.0, CNA)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)
- CWE-20
- Known exploited
- Added to CISA KEV Sep 27, 2026; federal remediation due Sep 30, 2026Apply 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.
- EPSS (exploitation in the next 30 days)
- 1.08% (percentile 65)
- Assigned by
- NetScaler
- NVD analysis
- Analyzed
- Record last updated
- Sep 29, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Citrix NetScaler ADC citrix_netscaler:adc (from the name) | before 14.1-73.37; before 13.1-64.23; before 14.1-73.37 FIPS; before 13.1.37.279 FIPS and NDcPP | CNA record |
Citrix NetScaler Gateway citrix_netscaler:gateway (from the name) | before 14.1-73.37; before 13.1-64.23 | CNA record |
citrix netscaler_application_delivery_controller citrix:netscaler_application_delivery_controller | from 13.1 before 13.1-64.23; from 13.1 before 13.1.37.279; from 13.1 before 13.1.37.279; from 14.1 before 14.1-73.37; from 14.1-66.68 through 14.1-73.37 | NVD |
citrix netscaler_gateway citrix:netscaler_gateway | from 13.1 before 13.1-64.23; from 14.1 before 14.1-73.37 | NVD |
References
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096vendor-advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-88771us-government-resource
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.