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[UPDATE] [high] Zammad: Multiple vulnerabilities

highCVE-2026-13229CVE-2026-61855CVE-2026-63006CVE-2026-63204CVE-2026-63205CVE-2026-63206
An attacker can exploit multiple vulnerabilities in Zammad to execute arbitrary code, bypass security measures, disclose confidential information, manipulate data, conduct cross-site scripting attacks, or gain unauthorized access to existing user accounts, including agent and administrator accounts.

CSIRTS triage

vendor: Zammadproduct: ZammadRemote code executionAuthentication bypassInformation disclosureCross-site scriptingOther
What
Multiple vulnerabilities in Zammad allow arbitrary code execution, security bypass, information disclosure, data manipulation, cross-site scripting, and unauthorized account access.
Who is affected
All Zammad deployments are affected across unspecified versions.
Urgency
High severity with multiple attack vectors including RCE and account compromise; immediate patching required.
Action
Update Zammad to the patched version addressing CVE-2026-13229, CVE-2026-61855, CVE-2026-63006, CVE-2026-63204, CVE-2026-63205, CVE-2026-63206, CVE-2026-63207, and CVE-2026-63208.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
high
Published
2026-08-05
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2641

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-13229coverage & exploitation statusNVD · CVE.org
CVE-2026-61855coverage & exploitation statusNVD · CVE.org
CVE-2026-63006coverage & exploitation statusNVD · CVE.org
CVE-2026-63204coverage & exploitation statusNVD · CVE.org
CVE-2026-63205coverage & exploitation statusNVD · CVE.org
CVE-2026-63206coverage & exploitation statusNVD · CVE.org
CVE-2026-63207coverage & exploitation statusNVD · CVE.org
CVE-2026-63208coverage & exploitation statusNVD · CVE.org
CVE-2026-63216coverage & exploitation statusNVD · CVE.org
CVE-2026-65828coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for Zammad

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories