EUVD-2026-20563
CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3Description
Zammad is a web based open source helpdesk/customer support system. Prior to 7.0.1 and 6.5.4, unauthenticated remote attackers were able to access the getting started endpoint to get access to sensitive internal entity data, even after the system setup was completed. This vulnerability is fixed in 7.0.1 and 6.5.4.
Analysis
Unauthenticated remote information disclosure in Zammad helpdesk system versions before 7.0.1 and 6.5.4 allows attackers to access sensitive internal entity data through exposed getting started endpoint. The vulnerability bypasses authentication controls, enabling unauthorized access to confidential system information post-setup. …
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Remediation
Within 24 hours: Identify all Zammad instances and document current versions via 'zammad-ctl status' or administrative console. Within 7 days: Upgrade to Zammad 6.5.4 or 7.0.1 or later (apply vendor patch immediately upon availability confirmation). …
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External POC / Exploit Code
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