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Python (CPython Zipfile Module): Schwachstelle ermöglicht Manipulation von Dateien

WID-SEC-2025-2230 · first 08.10.2025 · updated 04.09.2026 · CVSS 4,3

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What it is about

Python ist eine universelle, üblicherweise interpretierte, höhere Programmiersprache. Ein entfernter, anonymer Angreifer kann eine Schwachstelle im zipfile-Modul von CPython ausnutzen, um Dateien zu manipulieren.

Under what conditions?

Over the network and without logging in. This is the most dangerous combination: attackers can scan reachable devices automatically.

What can happen in the worst case

An attacker could use the vulnerability to

  • Dateien zu manipulieren

Am I affected?

Affected according to the BSI:

  • Dell NetWorker
  • Debian Linux
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Fedora Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • IBM SPSS Modeler
  • SUSE openSUSE
  • RESF Rocky Linux
  • Dell Avamar

and 2 more

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

What helps?

Update to at least:

  • Open Source Python CPython 3.15
  • Dell Secure Connect Gateway 5.34.00.16

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.

Information and sources

and 36 more sources in the original advisory

CVE: CVE-2025-8291

Source: BSI warning and information service (CERT-Bund); CISA. The assessment of the conditions is my reading of the BSI text; the external pages are in their original language.

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