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KnowBe4 Outage History

Every past KnowBe4 outage tracked by IsDown, with detection times, duration, and resolution details.

There were 231 KnowBe4 outages since February 2019. The 58 outages from the last 12 months are summarized below, with incident details, duration, and resolution information.

Minor April 27, 2026

April 2026: ADI Sync and Training Policy Upload Errors (US Only)

Detected Apr 27, 2026 9:40 AM EDT · Resolved Apr 27, 2026 1:20 PM EDT · Duration about 4 hours

KnowBe4 experienced a 3.7-hour service disruption affecting US customers' ability to push ADI files to KSAT and upload training policies. The incident impacted the Training and User Provisioning components, preventing customers from managing user data synchronization and training policy configurations. The engineering team implemented a fix that fully resolved both the ADI file sync and training policy upload issues.

Minor April 24, 2026

April 2026: PhishER Login Issues (CA Only)

Detected Apr 24, 2026 4:35 PM EDT · Resolved Apr 27, 2026 7:09 AM EDT · Duration 3 days

KnowBe4's PhishER platform experienced login issues that prevented users from accessing the Console component. The incident lasted approximately 62.6 hours before being resolved on April 27th, 2026.

Minor April 21, 2026

April 2026: Intermittent latency for Protect users - US Only

Detected Apr 21, 2026 4:10 PM EDT · Resolved Apr 27, 2026 7:14 AM EDT · Duration 6 days

KnowBe4's Protect service experienced intermittent latency issues affecting US users when viewing or sending emails via Web Access. The incident lasted approximately 135 hours (about 5.6 days) before being resolved. The issue was identified and fixed, with monitoring confirming the resolution.

Major April 20, 2026

April 2026: PhishER Access Issue for UK/CA Instances

Detected Apr 20, 2026 11:18 AM EDT · Resolved Apr 20, 2026 2:51 PM EDT · Duration about 4 hours

KnowBe4's PhishER console was inaccessible for UK and CA customers for 3.6 hours due to a "Restricted error" that prevented users from accessing the service. The issue affected the Console component and was resolved by implementing a fix, with users needing to refresh their pages to regain access.

Minor March 31, 2026

March 2026: Defend - Sending multiple abuse mailbox submission notifications

Detected Mar 31, 2026 11:13 AM EDT · Resolved Mar 31, 2026 12:46 PM EDT · Duration about 2 hours

KnowBe4's Defend service experienced an issue where some users received multiple abuse mailbox submission notifications instead of single notifications. The incident affected the email notification system for abuse reports. The issue was resolved within 5 minutes after a fix was identified and implemented.

Minor March 19, 2026

March 2026: Prevent and Protect - Administration Panel Slow or Inaccessible

Detected Mar 19, 2026 8:33 AM EDT · Resolved Mar 20, 2026 8:19 AM EDT · Duration about 24 hours

The KnowBe4 Administration Panel experienced slow performance or became inaccessible for users over a 23.8-hour period. The service team implemented a fix and monitored the system to ensure stability. The incident was fully resolved with normal access restored to the administration panel.

Major March 18, 2026

March 2026: Webforms not loading

Detected Mar 18, 2026 6:33 AM EDT · Resolved Mar 18, 2026 10:31 AM EDT · Duration about 4 hours

KnowBe4's Webforms service was unavailable for 4 hours due to a production domain being inadvertently included in a scheduled registrar migration, which caused DNS name server configuration changes and service interruptions. The issue was resolved by isolating the process problem and implementing a fix, with the service fully restored after DNS propagation completed.

Minor March 10, 2026

March 2026: PhishER Showing Incorrect Subject Line for Inbox Messages

Detected Mar 10, 2026 11:48 AM EDT · Resolved Mar 10, 2026 4:34 PM EDT · Duration about 5 hours

KnowBe4's PhishER service experienced an issue where ingested messages in the Inbox displayed incorrect sender addresses instead of the correct subject lines. The incident affected the PhishER Inbox component for 4.8 hours before being resolved with a fix implemented by the development team.

Major March 9, 2026

March 2026: Webform submission failures (UK & EMEA)

Detected Mar 9, 2026 8:09 PM EDT · Resolved Mar 11, 2026 6:59 AM EDT · Duration 1 day

KnowBe4 experienced a major incident where customers in the UK and EMEA regions encountered errors when attempting to submit forms through the Webforms feature. The service disruption prevented users from completing form submissions during the affected period. The incident was resolved after 10 minutes of investigation and remediation efforts.

Major March 4, 2026

March 2026: Defend and Prevent Admin Console Certificate Issue

Detected Mar 4, 2026 9:36 PM EST · Resolved Mar 5, 2026 7:45 AM EST · Duration about 10 hours

KnowBe4's Defend and Prevent admin consoles experienced a certificate error that prevented users from accessing these administrative interfaces for 10.2 hours. The issue was resolved by deploying a new certificate and allowing it to propagate across the global edge network. Traffic was restored once the certificate fix was implemented and fully propagated.