Hackers began exploiting vulnerability CVE-2026-8451 in Citrix NetScaler ADC and NetScaler Gateways less than 24 hours after disclosure.

Security updates fix six NetScaler ADC and Gateway vulnerabilities, including 8.8-rated DoS bugs and unauthenticated file read.

Citrix has patched five NetScaler ADC and NetScaler Gateway vulnerabilities, including a high-severity defect similar to CitrixBleed.

Hackers began exploiting vulnerability CVE-2026-8451 in Citrix NetScaler ADC and NetScaler Gateways less than 24 hours after disclosure.