CVE-2026-3055Insufficient 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 March 30, 2026). The chance it is exploited in the next 30 days is estimated at 91.5% (higher than 99.8% of all known vulnerabilities). Ready-made attack tooling exists: Metasploit, 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.