CVE-2026-102490: Zammad GmbH Zammad

What is CVE-2026-102490?

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.

CVSS7.8 NVD 3.1

SeverityHIGH

Exploitation In the wild In CISA KEV

EPSS1% · P44

Triage statusActive Exploit

ActionPatch immediately

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWECWE-269

NVD published2026-09-30

NVD last modified2026-10-09

Timeline

2026-09-30Published to the U.S. National Vulnerability Database (NVD)
2026-10-01First covered in a defend.network daily briefing
2026-10-02Added to the CISA Known Exploited Vulnerabilities (KEV) catalog
2026-10-05CISA federal remediation deadline (BOD 22-01)
2026-10-09NVD record last updated

CISA Known Exploited Vulnerability

Zammad GmbH Zammad Improper Privilege Management Vulnerability

Added to KEV2026-10-02

Federal patch deadline2026-10-05

Known ransomware useUnknown

Affected product

Zammad GmbH Zammad

NVD also lists CPE entries for: Zammad, Docker, Linux Kernel

Remediation Steps

Apply the vendor security update for Zammad Ticketing System as a priority.
Restrict network exposure of the affected service to trusted sources until patched.
Review logs and detections for indicators of exploitation.
Confirm fixed versions against the official vendor advisory before deploying.

References

Referenced in our briefings & reports

Vulnerability Priority Report – Week 1 of October 2026 (October 5 – 11)
Vulnerability Priority Report – Week 4 of September 2026 (September 28 – October 4)
Cisco SD-WAN, Zimbra, Zammad under attack; active exploitation confirmed (2026-10-01)

Browse all tracked CVEs in the defend.network CVE database →

🤖 This CVE page is generated by defend.network from NVD, CISA KEV, EPSS, and our verified daily briefings. Severity and exploitation data come from official sources; always verify remediation steps against the official vendor advisory before acting in production.