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CVE-2026-88771

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Citrix NetScaler Zero-Day in the Wild: Remote Code Execution, Web Shells and What to Do Now
Cybersecurity

Citrix NetScaler Zero-Day in the Wild: Remote Code Execution, Web Shells and What to Do Now

A critical remote code execution flaw in Citrix NetScaler ADC and Gateway — tracked as CVE-2026-88771 — is being actively exploited to run commands on exposed appliances, install web shells and deliver malware. Observers report attackers using a staged technique that poisons logs, triggers a diagnostic process to execute embedded commands, and then attempts to persist via web shells or a FreeBSD x64 binary. With NetScaler devices frequently positioned at…

Saugata Datta4 min read13
Citrix NetScaler Reboots After Emergency 0-Day Patch: What Teams Need to Know
Cybersecurity

Citrix NetScaler Reboots After Emergency 0-Day Patch: What Teams Need to Know

Citrix released emergency builds to address two actively exploited zero-day vulnerabilities in NetScaler appliances, but some organizations report that the patched appliances are repeatedly rebooting. What began as a rapid mitigation effort to stop remote command execution and DTLS-related attacks has morphed into an availability problem for some deployments—raising the difficult question defenders must balance: is this an operational outage or evidence of ongoing compromise? This post explains what’s known,…

Saugata Datta4 min read138
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