TUM discloses IT security incident, says TUMonline is back again

What happened

According to the Technical University of Munich (TUM), it has published a press release titled “IT Security Incident at TUM”. The page title reads “TUMonline is back again - IT Security Incident at TUM”. The site’s navigation describes TUMonline as TUM’s campus management portal TUM: IT Security Incident at TUM. The headline for this story is dated 2026-11-08 TUM: IT Security Incident at TUM.

The text we could retrieve from the page consists almost entirely of site navigation. The body of the press release was not available to us. The following is therefore not confirmed:

• what the incident was, and how it started
• what the page title’s “back again” refers to, and how long any service was unavailable
• whether any data was accessed or taken
• who was responsible
• which systems were affected

Only one outlet, TUM itself, is carrying this story. No independent verification exists in the sources we have.

Am I affected?

Not confirmed. The text we retrieved does not say which users, systems or data were involved. TUMonline appears in the page title and in the site navigation, but the retrieved text does not explain how it relates to the incident. Students, staff and researchers should check the original press release and any messages from TUM’s IT services for scope and guidance.

What to do now

1. Read the full press release on the TUM website: TUM: IT Security Incident at TUM.
2. Follow any instructions TUM gives for its accounts or services. We cannot cite specific steps such as password resets, because the sources available do not state any.
3. Treat unexpected messages about your TUM account with caution and use the official TUM site, not links in the message, to check them. This is general practice, not a recommendation from the TUM source.
4. Check back for updates. This advisory will be revised if TUM or other sources publish more detail.

Sources

• TUM: IT Security Incident at TUM