CVE-2025-6543
high-risk
Published 2025-06-25
Memory overflow vulnerability leading to unintended control flow and Denial of Service in NetScaler ADC and NetScaler Gateway when configured as Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server
Do I need to act?
~
2.0% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
!
CISA KEV: actively exploited in the wild
On the Known Exploited Vulnerabilities catalog — federal agencies must patch
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
9
CVSS 9.8/10
Critical
NETWORK
/ LOW complexity
Affected Products (4)
Affected Vendors
References (2)
54
/ 100
high-risk
Severity
32/34 · Critical
Exploitability
12/34 · Low
Exposure
10/34 · Low