What it is about

Exchange ist ein Groupware und Nachrichtensystem der Firma Microsoft. Ein entfernter Angreifer kann mehrere Schwachstellen in Microsoft Exchange ausnutzen, um Administratorrechte zu erlangen, beliebigen Code auszuführen, Spoofing-Angriffe durchzuführen, vertrauliche Informationen offenzulegen und Daten zu manipulieren.

Under what conditions?

Over the network.

What can happen in the worst case

An attacker could use the vulnerability to

• Administratorrechte zu erlangen
• beliebigen Code auszuführen
• Spoofing-Angriffe durchzuführen
• vertrauliche Informationen offenzulegen
• Daten zu manipulieren

Am I affected?

Affected according to the BSI:

• Microsoft Exchange Server
• Microsoft Exchange Server Subscription Edition RTM

The installed version is usually shown under “Help → About” or in the device’s admin interface.

What helps?

Install the updates provided by the vendor; details in the sources below.

Is the vulnerability already being exploited?

None of the CVEs is in the CISA catalogue of exploited vulnerabilities. That does not mean there are no attacks, only that none are documented.