high severity November 18, 2023 · 3 min read Unverified claim — what this is

Vanderbilt University Medical Center Listed by Meow Ransomware Group

If you were named in this filing, here’s what is being claimed, and what it would mean for you.

Vanderbilt University Medical Center was listed on Meow's leak site. Meow claims to have stolen internal data. This is the group's claim, not a confirmed finding.

Vanderbilt University Medical Center Listed by Meow Ransomware Group

On November 18, 2023, Vanderbilt University Medical Center appeared on the leak site operated by the meow ransomware group, with the listing stating that 100% of the stolen data had been leaked. The disclosure indicates that internal files were exfiltrated during a ransomware attack on the medical center. The exact number of individuals whose information may have been exposed remains unknown, as neither the leak-site posting nor any subsequent official notification has quantified affected records.

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Details from the Leak Site

The meow ransomware group’s onion site lists Vanderbilt University Medical Center as a victim and claims full exfiltration of internal files. The primary disclosure does not specify the volume or exact categories of data taken, only that the files were obtained in a ransomware incident and that 100% of the stolen material has now been published. Public mirrors of the leak site, such as ransomware.live, preserve this claim without additional technical detail from the threat actor. No sample files or screenshots appear in the initial listing, which is consistent with meow’s relatively sparse public presentation style.

Why This Matters for You and Your Family

When a major medical provider like Vanderbilt University Medical Center suffers a ransomware breach, patient records, insurance details, Social Security numbers, and clinical information can end up in criminal hands. Even though the precise data types and record count are not stated in the disclosure, the nature of healthcare data means identities, medical histories, and financial billing records are frequently involved. For you or your family members who have received care at the center, this creates immediate risk of identity theft, insurance fraud, and long-term medical-identity abuse that can follow you for years.

Healthcare breaches carry higher stakes than most retail or corporate incidents because the stolen information cannot simply be changed like a password. A leaked diagnosis or treatment record becomes permanent leverage for extortion or impersonation.

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Report details & sourcing

Attributed to Meow · 144 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed November 18, 2023

Last reviewed August 8, 2026

Affected Unconfirmed

By GalaxyWarden Threat Research · Editorial & sourcing standards

Unverified claim — what this report is

This page documents a public listing on a ransomware/extortion group’s leak site, tracked via public threat-intelligence sources. A listing is the attacker’s claim. GalaxyWarden aggregates and reports such claims; we have not independently verified that a breach occurred, what data (if any) was taken, or the accuracy of anything the group asserts, and the named organisation has not necessarily confirmed the incident. Sections above describe what the listing shows and the group’s documented history — not verified findings about the named organisation. If you represent this organisation and believe anything here is inaccurate, tell us and we’ll review it promptly.

Editorial & sourcing policy

GalaxyWarden is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data. Breach information is compiled from publicly accessible sources and threat-intelligence platforms, and is reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — see our content & takedown policy or write to support@galaxywarden.com.

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Meow — 144 incidents tracked

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