Vulnerability intelligence
CVE-2025-5777
Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
Citrix NetScaler ADC and Gateway
Citrix NetScaler ADC and Gateway contain an out-of-bounds read vulnerability due to insufficient input validation. This vulnerability can lead to memory overread when the NetScaler is configured as a Gateway (VPN virtual server, ICA Proxy, CVPN, RDP Proxy) OR AAA virtual server.
CVSS Score
9.3
Critical
EPSS — Exploit Probability
0.0%
Riskier than 0% of all CVEs
Exploitation
Confirmed in the wild
Used in ransomware campaigns
Remediation
Patch available
Federal deadline 2025-07-11
CISA 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. Deadline for federal agencies: 2025-07-11.
1 article across 1 outlet · first covered Apr 20, 2026 · latest Apr 20, 2026
Coverage timeline
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Hackers Abuse QEMU for Defense Evasionwww.securityweek.com · Apr 20, 2026