high severity November 24, 2025 · 3 min read Unverified claim — what this is

Universidade Municipal de São Caetano Listed by Medusa Ransomware Group

If you are a resident of Universidade Municipal de São Caetano, here’s what is being claimed, and what it would mean for you.

USCS offers a diverse range of educational programs including in-person and distance learning undergraduate degrees, technical courses, and postgraduate studies such as MBAs and doctorates. The university also provides non-degree courses aimed at skill enhancement and is equipped with facilities for secondary education. Services include free legal assistance, fiscal education, and health services, catering to both students and the community. With a focus on quality and flexibility, USCS serves a wide array of clients including students at various academic levels and professionals seeking furth
— from Medusa’s own leak-site posting. This is the group’s claim, quoted verbatim; it is not GalaxyWarden’s reporting and has not been independently verified.

Universidade Municipal de São Caetano Listed by Medusa Ransomware Group

On November 24, 2025, the Universidade Municipal de São Caetano appeared on the leak site of the Medusa ransomware group after its internal files were allegedly exfiltrated during a ransomware attack.

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What Public Reporting Shows

Public reporting indicates that Medusa listed the Brazilian municipal university, also known as USCS, on its data-leak portal. The university offers undergraduate degrees, technical courses, postgraduate programs including MBAs and doctorates, secondary education, free legal assistance, fiscal education, and health services to students and local residents. Available reporting describes the incident as a ransomware attack in which internal files were taken. The exact number of people whose records may have been exposed remains unknown. No specific deadline for payment has been publicly detailed in the initial listing.

Why This Matters for You and Your Family

When a university suffers a breach, the personal information of current and former students, faculty, staff, and even people who used its free community services can end up in the hands of criminals. Internal files often contain names, addresses, dates of birth, national identification numbers, academic records, employment details, and contact information for entire households. If your family includes anyone who studied at or interacted with USCS, your data may now be circulating in criminal circles. Once stolen, this information rarely stays contained; it is sold, traded, and used to fuel further attacks against you.

The Doxxing and Identity-Chain Implications

A single breach like this rarely stops at one dataset. Criminals combine the newly exposed university records with information already available from earlier leaks. They link your email address, phone number, student ID, and family members’ names to gaming accounts, social-media handles, and other online profiles. This creates an identity chain that can lead to doxxing, account takeovers, and targeted harassment. Credential leaks from educational institutions frequently cascade into gaming platforms, especially when children or teenagers reuse the same passwords for school-related logins and their personal Roblox, Fortnite, or Steam accounts.

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Report details & sourcing

Attributed to Medusa · 515 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed November 24, 2025

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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Medusa — 515 incidents tracked

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