Known vulnerability record
CVE-2025-5777
Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
Summary
Citrix NetScaler ADC and Gateway Out-of-Bounds Read Vulnerability
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.
Signals
Keep the signals separate
CVSS severitycriticalScore 9.3 · source Citrix
EPSS probability100.0%Probability of exploitation in the next 30 days; not severity
CISA KEVKnown exploitedAdded 2025-07-10
Ransomware useknownPreserved as known / unknown, not a truthy default
Timeline
Dates and provenance
- CVE published
- 2025-06-17
- CVE modified
- 2026-08-04
- KEV date added
- 2025-07-10
- Dataset fetched
- 2026-08-21T03:55:05.238Z
Sources
Original records
- https://www.cve.org/CVERecord?id=CVE-2025-5777 ↗
- https://nvd.nist.gov/vuln/detail/CVE-2025-5777 ↗
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-5777 ↗
Version history: normalized permanent page created 2026-08-20. Machine-enriched fields remain source-attributed.