CVE-2025-6543
CISA KEV
ACT NOW
Priority: 0.00
BB Relevance:
2/100
Published: N/A
Modified: N/A
First seen: 2026-10-29
Status: pending_score
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.
CISA Known Exploited Vulnerability
Vendor / Product
Citrix — NetScaler ADC and Gateway
Date Added
2025-06-30
Remediation Due
2025-07-21
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