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Kiteworks six-hour shutdown advisory

Advisory/Mitigation
First reported
Last updated
Happening score
H score 69
3 unique sources, 5 articles

Summary

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Kiteworks issued a worldwide precautionary shutdown advisory for Kiteworks systems after receiving credible threat intelligence from law enforcement and federal intelligence authorities about a potentially imminent attack. Customers were told to take systems offline for six hours on September 26, including systems not directly accessible from the internet, and the company said the action was preventative rather than a response to a confirmed breach. On September 27, Kiteworks lifted the shutdown recommendation after patching a critical vulnerability, brought hosted customer systems back online, and told remaining self-hosted customers they could restart their systems. The company said continuous monitoring found no suspicious activity, no confirmed compromise of any Kiteworks or customer system, and that other Kiteworks products were unaffected.

Related Happenings

Citrix NetScaler urgent patch guidance for CVE-2026-19490

Advisory/Mitigation
H score54 First: 04.09.2026 18:25 Last: 04.09.2026 18:25 Sources 1

About this happening: Citrix NetScaler administrators were told to urgently review exposure and upgrade impacted appliances for CVE-2026-19490, a CVSS 9.3 authentication-bypass flaw...

Open Happening

Timeline

  1. 29.09.2026 12:04 3 articles · 10d ago

    Kiteworks lifts shutdown advisory after patching critical vulnerability

    Mitigation Patch Update

    Kiteworks lifted its precautionary shutdown recommendation for customers on September 27th after patching a critical vulnerability, bringing hosted customer systems back online and telling remaining self-hosted customers they could restart their Kiteworks systems; the company said continuous monitoring found no suspicious activity, no indication that any Kiteworks or customer system was compromised, and all other Kiteworks products were unaffected.

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  2. 26.09.2026 00:41 2 articles · 13d ago

    Kiteworks warns customers to shut down servers for six hours

    Initial Disclosure

    Kiteworks told customers worldwide to shut down Kiteworks systems for six hours after receiving credible threat intelligence from law enforcement and federal authorities indicating a potentially imminent attack on Kiteworks systems; the company said the advisory was preventative and not a response to a confirmed breach.

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  3. 26.09.2026 00:41 2 articles · 13d ago

    Kiteworks sets a Saturday shutdown window for worldwide customers

    Untyped Phase

    Kiteworks set a six-hour precautionary shutdown window for customers worldwide on Saturday, September 26, instructing them to take Kiteworks systems offline before the scheduled window even if the systems are not directly accessible from the Internet.

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