CVE-2026-102490
7.8, high Known exploitedZammad GmbH Zammad Improper Privilege Management Vulnerability
- CVSS
- 7.8, high high CVSS v3.1
- EPSS, next 30 days
- 0.5% higher than 44.7% of scored CVEs
- Exploitation
- Confirmed in the wild
- Published
- 30 Sept 202618 days ago
Known exploited
CISA added this to the Known Exploited Vulnerabilities Catalog on 2 Oct 2026. US federal agencies had to remediate by 5 Oct 2026, a deadline that has passed.
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.
Description
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.
Details
- Vendor
- Zammad GmbH
- Product
- Zammad
- Weakness
- CWE-269 (opens in a new tab)
- Status
- Analyzed
- Updated
- 9 Oct 2026
- Assigner
- csirt@divd.nl
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References 5
Advisories 4
The kind is read from NVD's tags where present and from the shape of the URL otherwise, so treat it as a hint.
Other Zammad GmbH CVEs
Every Zammad GmbH CVE we holdSame vendor in what we hold, not a known link between the flaws.
- CVE-2026-102489 Zammad GmbH Zammad Session Fixation Vulnerability KEV EPSS 1% 9.8, critical
Beyond this page
Is CVE-2026-102490 in your network?
This page tells you how dangerous CVE-2026-102490 is out there. Whether it sits on one of your devices, only a scan of your own network can tell. That is what our systems do, every day, for the companies we protect.
CVE-2026-102490 is in the CISA catalogue of exploited vulnerabilities: attackers are already exploiting it.
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Assembled from the NVD 2.0 API, the CISA Known Exploited Vulnerabilities Catalog and FIRST EPSS. Scores are as of our last collection on 18 Oct 2026, not the live upstream state.