Risk Letters

Exploited vulnerability

CVE-2026-102489

TLP:CLEAR

Zammad GmbH Zammad Session Fixation Vulnerability

Zammad GmbH Zammad contains a session fixation vulnerability that can lead to remote code execution as the zammad user. This vulnerability can be chained with CVE-2026-102490.

Facts

  • Vendor: Zammad GmbH
  • Product: Zammad
  • CVSS: 8.7
  • EPSS (probability of exploitation within 30 days): 22.5 %
  • On CISA's Known Exploited Vulnerabilities list since: 2 October 2026
  • First known exploitation: 30 September 2026
  • CISA's deadline for US federal agencies: 5 October 2026
  • Weakness: CWE-384
  • First seen by Risk Letters: 2 October 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD