CVE-2026-102490: Zammad GmbH Zammad Improper Privilege Management Vulnerability

CISA Known Exploited Vulnerabilities

Name

Zammad GmbH Zammad Improper Privilege Management Vulnerability

Vendor

Zammad GmbH

Product

Zammad

Added to the catalog

2026-10-02

Due date for US federal agencies

2026-10-05

Weaknesses

CWE-269

Catalog version

2026.10.30

Zammad GmbH Zammad contains an improper privilege management vulnerability that can allow the local zammad user to escalate privileges to root. This vulnerability can be chained with CVE-2026-102489.

Required action (CISA)

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.

Ransomware use: CISA does not mark known use of this vulnerability in ransomware campaigns.

Links in CISA's notes

• https://zammad.com/en/product/releases/
• https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2
• https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk
• https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk
• https://nvd.nist.gov/vuln/detail/CVE-2026-102490

Read on 2026-11-02T23:39:54.475Z under licence cisa-kev-cc0@b0067899 from https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

NVD analysis

Status

Analyzed

Published

2026-09-30T17:16:40.707

Last modified

2026-10-09T14:21:05.030

Weaknesses

CWE-269

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.

References

• https://csirt.divd.nl/CVE-2026-102490 (Third Party Advisory)
• https://csirt.divd.nl/DIVD-2026-00015 (Third Party Advisory)
• https://github.com/zammad/zammad/security/advisories/GHSA-p97w-927q-8vxq (Vendor Advisory)
• https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490 (Vendor Advisory)
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102490 (US Government Resource)

This product uses the NVD API but is not endorsed or certified by the NVD.

Read on 2026-11-02T23:42:31.494Z under licence nvd-api-terms-of-use@ff2a5288 from https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-102490

CVE record

Title (CNA)

Local privilege escalation in Zammad v1.5.0 to v7.2.2 installed via DEB or RPM package

Assigner

DIVD

State

PUBLISHED

Published

2026-09-30T16:21:20.601Z

Updated

2026-10-08T19:55:53.033Z

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.

References

• https://csirt.divd.nl/DIVD-2026-00015
• https://csirt.divd.nl/CVE-2026-102490
• https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490
• https://github.com/zammad/zammad/security/advisories/GHSA-p97w-927q-8vxq

Read on 2026-11-03T02:18:16.936Z under licence cve-terms-of-use@81bfa2f3 from https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/102xxx/CVE-2026-102490.json

Defensive techniques (MITRE D3FEND)

D3FEND maps these defensive techniques to the weakness (CWE) that NVD lists for this CVE, through the digital artifacts the weakness affects. D3FEND does not say they stop this vulnerability.

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