CVE-2026-102489

CRITICAL9.8

CISA KEV

Published 2026-09-30 · Updated 2026-10-02 · Source csirt@divd.nl

Description

Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The vulnerability is also present in version 7.0.0 to version 7.1.3, but not exploitable due to environment conditions.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-384CWE-384

CISA Known-Exploited Vulnerability

Product: Zammad GmbH — Zammad

Name: Zammad GmbH Zammad Session Fixation Vulnerability

Date added: 2026-10-02 · Due: 2026-10-05

Required action: Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

References

View on NVD

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