Hazard

Is CVE-2017-6316 being exploited?

Weaponised and widely attempted

Reliable public exploit code exists, or mass exploitation attempts are probable. Patch inside days, not weeks.

Citrix Multiple Products Remote Code Execution Vulnerability

Citrix · NetScaler SD-WAN Enterprise, CloudBridge Virtual WAN, and XenMobile Server

CVSS 9.8 EPSS 73% 2 public exploits Fix deadline passed 15 April 2022

What it is

A vulnerability has been identified in the management interface of Citrix NetScaler SD-WAN Enterprise and Standard Edition and Citrix CloudBridge Virtual WAN Edition that could result in an unauthenticated, remote attacker being able to execute arbitrary code as a root user. This vulnerability also affects XenMobile Server.

Why we say that

  • EPSS puts exploitation in the next 30 days at 73%
  • 2 public exploits published
  • CISA's federal remediation deadline (2022-04-15) has passed
  • CVSS 9.8 critical
  • Listed in the CISA Known Exploited Vulnerabilities catalogue

Every line above comes from a named public source. Where the evidence is thin, we say so rather than inventing confidence — see methodology.

What to do

Apply updates per vendor instructions.

Public exploit code

Indexed from Exploit-DB. Presence of code raises urgency; absence does not mean safety.

What it costs when this goes wrong

This is where UK enforcement meets the vulnerability record. Where an unfixed vulnerability leads to a breach, the ICO treats it as a security failure under UK GDPR. Recent cases:

All UK cases caused by unpatched software →