high severity February 01, 2025 · 3 min read Unverified claim — what this is

CESI Listed by Termite Ransomware Group

If you are a customer of Cesi, here’s what is being claimed, and what it would mean for you.

CESI is a private French higher education and vocational training group specialising in training engineers, managers, technicians and supervisors.
— from Termite’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.

On February 1, 2025, the French higher education group CESI appeared on the leak site of the Termite ransomware operation after its internal files were allegedly exfiltrated during a ransomware attack.

Already exposed?

You can’t unleak data. You can take away what it’s worth.

A leaked record is where it starts, not where it ends. What turns it into your front door is the look-up sites publishing your address beside your name — and those are what an AI reads when somebody asks about you. The free scan shows you both. We write to 580 companies.

See what is exposed about you — free scan →

Watch Cesi

Get alerted the next time Cesi files a breach with any US regulator — the filing, dated and sourced. A free single-company slice of Signals; no account needed.

We’ll email you only about Cesi’s future breach filings and how to watch a whole vendor list — not general marketing. Unsubscribe any time.

Watching your whole vendor list (50 to 500 companies, by tier) is GalaxyWarden Signals.

What Public Reporting Shows

Available reporting describes CESI as a private French organization that provides engineering, management, technical, and supervisory training programs. The incident involved the theft of internal documents, though the exact number of people affected remains unknown. Public reporting indicates the data was posted to the Termite leak site on the date above, following the group’s standard practice of publishing stolen material when ransom demands are not met.

Internal files were the primary material exfiltrated. No Reported Details have emerged about the precise volume or specific categories of personal information contained in the leak. The attack follows the typical ransomware pattern of initial compromise, data theft, and subsequent extortion pressure.

Why This Matters for You and Your Family

When a training organization like CESI suffers a breach, the people whose records end up in the stolen files are often current students, recent graduates, faculty, and administrative staff. If you or anyone in your family has trained with CESI, your personal details may now sit in a ransomware leak repository. Once that material reaches criminal forums, it can be combined with other stolen records and used for identity theft, phishing, or harassment.

You’ve used today’s 5 free articles · resets tomorrow

Create a free account to keep reading

The rest of this article comes straight back — free, no card, nothing you’ve already read goes away. Then see whether your own data is exposed too: the scan on this site is free with or without an account, and the account is what keeps the result after the emailed link expires.

Reading this for a company?

GalaxyWarden Signals watches the organisations you name and emails you when one of them actually discloses — SEC 8-K Item 1.05 filings and corroborated breach records, with a JSON API. It monitors companies, not people: it does not scan you and does not remove your personal data.

See GalaxyWarden Signals →

Or make a free reader account first

Free reader account

No card, no charge. You read the blog without a limit — every article, no daily count — and it saves your exposure-scan results so you can open them again after the emailed link expires. We won’t email you anything else unless you tick the box asking us to. The next step shows what the paid plans add — free stays the first option on it.

Create a free account →

Free accounts are for personal use. If you’re reading for a company, that’s Signals (terms).

Already have an account? Log in

What the free scan actually returns

Sample resultyou@email.comIllustrative — not a real person

Found on people-search siteswe remove these

These listings are live, public, and legal to remove — and removing them is what we do.

value redacted in this sampleage, relatives, address historySpokeo

value redacted in this samplephone, household, property recordsBeenVerified

value redacted in this sample580 companies checked

Found in breach recordsverifiedreported — unverified

Each record is labeled: confirmed breach data, or an attacker’s claim no one has verified.

verifiedvalue redacted in this samplepassword + phone · 2024telecom breach

unverifiedvalue redacted in this sampleclaimed in ransomware listing · 2026leak-site claim

Leaked data cannot be deleted from the internet — anyone claiming otherwise is lying. Broker listings can be removed. We do the second, and show you exactly what to fix from the first.

Report details & sourcing

Attributed to Termite · 57 incidents tracked →

Severity High the filing does not enumerate what was exposed

Disclosed February 01, 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.

Threat-actor tracker

Termite — 57 incidents tracked

Every breach we've attributed to Termite, in one running log. See who else they've hit →

Related breaches

high October 01, 2026