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Cyber Threat
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Ransomware victim Technology

OpenText

Listed by Mimori on · organisation based in Canada

opentext.com

Disclosed
Oct 20, 2026
Leak-site listing date
Threat group
Mimori
2 victims listed
Country
Canada
#3 most targeted
Sector
Technology

ThreatAI analysis

Compiled from this incident record and the threat intelligence profile for Mimori. Figures and technique mappings are quoted from the source data, not inferred.

Mimori listed OpenText on its dark web leak site on 20 October 2026. The Canadian technology firm helps customers organize, integrate, and protect data with an extensive suite of enterprise information management software.

About OpenText

OpenText Corporation is a Canadian company that develops and sells enterprise information management software. OpenText can help you tackle the most complex digital transformation programs with confidence. With the worlds most complete and integrated information management platform, we empower our customers to organize, integrate, and protect data and content as it flows through business processes inside and outside their organization. Sector: Technology - Files: 94306 - Publication planned: 2026-10-29T19:36:20Z

Source record: ransomware.live

About the Mimori group

Mimori has listed 2 victims since October 2026.

Incident analysis

OpenText was listed by Mimori ransomware, a group with 2 victims recorded in this database. The listing appeared on the group's leak site on October 20, 2026.

OpenText is based in Canada and operates in the Technology sector. Canada ranks #3 worldwide for ransomware disclosures, with 974 victims in this database.

Sector context. Technology companies hold intellectual property, customer data, and source code — all highly valuable assets. A successful ransomware attack can also put downstream customers at risk through supply chain exposure.

Mimori typically follows a double extortion model: data is exfiltrated from the victim's systems before files are encrypted, so the victim faces two demands at once — pay to restore access, and pay to keep stolen data unpublished. The leak site, where this listing appeared, is the lever for the second demand.

Source. Public leak-site disclosures aggregated via the ransomware.live API. The disclosure date is when the listing was published, which can differ from the date of compromise. This site does not publish or link to stolen data. Last updated .

Frequently asked questions

Was OpenText attacked by ransomware?

Yes. OpenText was listed as a victim of the Mimori ransomware group on October 20, 2026. The organisation is based in Canada and operates in the Technology sector. The disclosure appeared on the group's dark web leak site.

Which ransomware group attacked OpenText?

OpenText was attacked by Mimori ransomware. Mimori is one of the most active ransomware groups, having claimed 2 victims globally. The group typically employs a double-extortion model: encrypting the victim's files and threatening to publish stolen data.

When did the OpenText ransomware attack occur?

The ransomware attack on OpenText was disclosed on October 20, 2026. This date reflects when the victim was published on the threat group's leak site, which may differ from the actual date of initial compromise.

What data was stolen in the OpenText ransomware attack?

The specific data stolen from OpenText has not been independently verified by this platform. Ransomware groups typically exfiltrate data before encrypting systems and use the threat of publication to pressure victims. As a Technology organisation, OpenText likely held source code, intellectual property, and customer data.

How can organisations protect against Mimori attacks?

To defend against Mimori and similar threat actors, organisations should: maintain regular offline backups tested for restoration; implement network segmentation to limit lateral movement; deploy multi-factor authentication on all remote access; use endpoint detection and response (EDR) tools; conduct regular phishing and security awareness training; and monitor threat intelligence feeds for indicators of compromise (IOCs) associated with active groups.