CVE-2025-5777
Citrix NetScaler ADC and Gateway: CWE-908
- Act now
- CVSS 9.3 Critical
- CISA KEV, due
- VulnCheck KEV
- ENISA exploited-vulnerability catalog
What it is
ReportedCitrix 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.
Dates
What is affected
ReportedCitrix; NetScaler ADC and Gateway. Product-level identification only; no affected-version conclusion is available from this field.
Dates
Urgency and basis
Tracker computedAct now
Current priority score and EPSS: loading from the tracker record. They are read when this page loads and are not shown without JavaScript. They change daily and are not part of "Source last updated".
Dates
Exploitation evidence
ReportedActive exploitation · CISA KEV · VulnCheck KEV · ENISA exploited-vulnerability catalog
Dates
What to do
ReportedApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
Source remediation ↗Dates
Detection and validation
Mapped metadata availability only. These signals do not change priority.
Sigma
HackTool - SecurityXploded Execution. Level: critical. Status: stable.
Open Sigma metadataAtomic
Access Saved Credentials via VaultCmd. Executor: command_prompt. Elevation: not required.
Open Atomic metadataNuclei
Citrix NetScaler Memory Disclosure - CitrixBleed 2. Check identifier: CVE-2025-5777.
Open Nuclei metadata
Evidence detail
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