# CVE-2025-6543: A Citrix NetScaler ADC and Gateway bug is being used in attacks

Status: Being used now (CISA KEV, added 2025-06-30)
Who: 
Do this: 

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Citrix NetScaler ADC and Gateway (CVE-2025-6543) 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-2025-6543. 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 Gateway contain a buffer overflow vulnerability leading to unintended control flow and Denial of Service. NetScaler must be configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.

## Sources
- https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX694788
- https://www.netscaler.com/blog/news/netscaler-critical-security-updates-for-cve-2025-6543-and-cve-2025-5777/
- https://nvd.nist.gov/vuln/detail/CVE-2025-6543
- https://nvd.nist.gov/vuln/detail/CVE-2025-6543

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