CVE-2025-5777NetScaler ADC and NetScaler Gateway - Insufficient input validation leading to memory overread

In plain English

A critical-severity out-of-bounds read in ADC from NetScaler. Attackers are actively exploiting it in the wild (listed by CISA on July 10, 2025). It has been used in ransomware campaigns. The chance it is exploited in the next 30 days is estimated at 100.0% (higher than 99.9% of all known vulnerabilities). Ready-made attack tooling exists: Nuclei, public proof-of-concept code. Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.