# CVE-2026-88771: Attackers can run commands on Citrix NetScaler before login

Status: Being used now (CISA KEV, added 2026-09-27) · Cloudflare Zero Wire: 
Who: Companies using Citrix NetScaler ADC or Gateway, including default setups.
Do this: Update NetScaler using Citrix's bulletin. If you may be hit, investigate as well.

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Citrix NetScaler (CVE-2026-88771) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2026-88771. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.

## Official description
Citrix NetScaler ADC and NetScaler Gateway contain an improper input validation vulnerability that could allow an unauthenticated attacker to execute arbitrary commands.

## Sources
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX697096
- https://support.citrix.com/external/article/CTX694799/steps-to-take-if-netscaler-adc-is-suspec.html
- https://nvd.nist.gov/vuln/detail/CVE-2026-88772
- https://radar.cloudflare.com/security/zero-wire/citrix-netscaler-command-execution
- https://nvd.nist.gov/vuln/detail/CVE-2026-88771

Generated by isitexploited.org from public sources. Verify version numbers against the vendor before acting.