CVE-2025-6543
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
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EPSS — probability of exploitation (30 days)
10.1%
95.4th percentile
CISA KEV
Listed
Added 2025-06-30 · patch by 2025-07-21
Weakness / dates
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Published — · modified —
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.