CVE-2026-102490
highpriority · act · 90OT risk · criticalKEV · exploitedEU KEV · NCSC-NLEPSS 0.005 · 45 %ileDENLUSadded 2026-10-02remediate by 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.
EU KEVflagged by NCSC-NLreported 2026-09-30
All versions of Zammad including the latest alpha enable the local zammad user to escalate privileges to root.
EPSS · scored 2026-10-24
Zammad GmbH Zammad Improper Privilege Management Vulnerability
Zammad packages built with packager.io (DEB and RPM) could have allowed a local attacker who already had file system write privileges as the unprivileged zammad service account to escalate to full root privileges on the host. Service processes began running as root and executed files that were owned and writable by the zammad account before dropping their identity to that account. An attacker holding that foothold could have escalated within seconds, because the affected services were restarted automatically whenever they stopped; no administrator interaction was required. Only installations from the DEB and RPM packages were affected — installations from source or the official container images were not. All released packaged versions were affected.
cvss
Technical severity, 0–10. One row per scoring source.
base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.8–9.4
ssvc
A stakeholder decision — act, attend, or track — from exploitation and impact.
weaknesses
The CWE weakness classes this flaw belongs to.
affected products (5)
Products and version ranges known to be affected.
advisories (3)
Vendor and ecosystem advisories describing this.
- NCSC-2026-0396Kwetsbaarheden aangetroffen in ZammadNL2026-09-30csaf · ncsc_nlNL
Er zijn twee zeroday-kwetsbaarheden aangetroffen in Zammad.
- WID-SEC-W-2026-3694Zammad: Mehrere Schwachstellen ermöglichen Ausführen von beliebigem Programmcode und PrivilegieneskalationDeutsch2026-09-30csaf · cert_bundDE
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Zammad ausnutzen, um beliebigen Programmcode mit Benutzerrechten auszuführen und um Root-Rechte zu erlangen.
- WID-SEC-W-2026-3839Zammad: Schwachstelle ermöglicht PrivilegienerweiterungDeutsch2026-10-08csaf · cert_bundDE
Ein lokaler Angreifer kann eine Schwachstelle in Zammad ausnutzen, um seine Privilegien zu erweitern
sources
Which sources assert this record, and when.
references (5) nvd
External citations — patches, advisories, analysis.
- https://csirt.divd.nl/CVE-2026-102490Third Party Advisory
- https://csirt.divd.nl/DIVD-2026-00015Third Party Advisory
- https://github.com/zammad/zammad/security/advisories/GHSA-p97w-927q-8vxqVendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102490US Government Resource
- https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490Vendor Advisory
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