ACTIVELY EXPLOITED3 sources verified·1 min read
By Lyrie Threat Intelligence·6/30/2025
CVE-2025-6543 added to CISA KEV: Citrix NetScaler ADC and Gateway
Status: ✅ Confirmed exploited in the wild
Date added: 2025-06-30
Required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Due date: 2025-07-21
Why this matters
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
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