CVE-2026-102490
KEV: known exploited SSVC: activeLocal privilege escalation in Zammad v1.5.0 to v7.2.2 installed via DEB or RPM package
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:C/RE:X/U:X
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/AU:Y/V:D
Attack conditions and impact
Derived from the NVD CVSS 3.1 vector| Metric | Value | Meaning |
|---|---|---|
| Attack vector AV | L | Local |
| Attack complexity AC | L | Low (easy) |
| Privileges required PR | L | Regular user |
| User interaction UI | N | None |
| Scope S | U | Unchanged |
| Confidentiality C | H | High |
| Integrity I | H | High |
| Availability A | H | High |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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.
CISA KEV entry
Zammad GmbH Zammad Improper Privilege Management Vulnerability — Zammad GmbH / Zammad
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: 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.
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 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: 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
CVSS assessments
| Provider | Version | Score | Vector |
|---|---|---|---|
| NVD / [email protected] (Secondary) | 4.0 | 9.4 CRITICAL | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:X/V:C/RE:X/U:X |
| NVD / [email protected] (Primary) | 3.1 | 7.8 HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
| CNA / DIVD | 4.0 | 8.5 HIGH | CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/AU:Y/V:D |
| CNA / DIVD | 4.0 | 9.4 CRITICAL | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:A/AU:Y/V:C |
Affected products and packages
CNA (CVE.org)
| Vendor | Product | Versions |
|---|---|---|
| Zammad GmbH | Zammad | affected: 1.5.0 … < 7.2.2 unknown: * … < 1.5.0 unaffected: 7.2.2 … < * default: unaffected |
NVD CPE (1)
Show CPE list
| Vendor | Product | Range | CPE |
|---|---|---|---|
| zammad | zammad | < 7.2.2 | cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* |
Linux distribution status
References (5)
- https://csirt.divd.nl/CVE-2026-102490 NVD, CNA Third Party Advisorythird-party-advisory
- https://csirt.divd.nl/DIVD-2026-00015 NVD, CNA Third Party Advisorythird-party-advisory
- https://github.com/zammad/zammad/security/advisories/GHSA-p97w-927q-8vxq NVD, CNA Vendor Advisoryvendor-advisorytechnical-description
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102490 NVD, ADP CISA-ADP US Government Resourcegovernment-resource
- https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490 NVD, CNA Vendor Advisoryvendor-advisory