CVE-2026-102490
Zammad GmbH Zammad Improper Privilege Management Vulnerability - [Actively Exploited]
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.
INFO
Published Date :
Sept. 30, 2026, 5:16 p.m.
Last Modified :
Oct. 9, 2026, 2:21 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CISA KEV (Known Exploited Vulnerabilities)
For the benefit of the cybersecurity community and network defenders—and to help every organization better manage vulnerabilities and keep pace with threat activity—CISA maintains the authoritative source of vulnerabilities that have been exploited in the wild.
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.
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.
Unknown
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
Affected Products
The following products are affected by CVE-2026-102490
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | CRITICAL | [email protected] | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 4.0 | HIGH | b87402ff-ae37-4194-9dae-31abdbd6f217 | ||||
| CVSS 4.0 | CRITICAL | b87402ff-ae37-4194-9dae-31abdbd6f217 | ||||
| CVSS 4.0 | CRITICAL | [email protected] |
Solution
- Update Zammad to the latest stable version.
- Verify that local user privilege escalation is no longer possible.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-102490.
| URL | Resource |
|---|---|
| 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 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-102490 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-102490
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-102490 vulnerability anywhere in the article.
-
The Hacker News
⚡ Weekly Recap: Helpdesk 0-Days, Rogue Certs, ShinyHunters Arrest, AI-Fooling Malware and More
Some meetings last longer than it took attackers to jump on a newly disclosed security flaw this week. Within hours, they were already testing it. That's not much time to read the warning, let alone d ... Read more
-
The Hacker News
ThreatsDay: AI-Powered Zero-Day Chain, 543K Live Secrets, Model Inspection RCE and 13 More Stories
This week, the useful words are boring ones: inspect, cache, compile, store, trust. Each sounds harmless. Each can become an attack path when a system does a little more than people expect. A model ch ... Read more
-
security.nl
Zerodaylekken in ticketsysteem Zammad gebruikt bij hack van DIVD
Het Dutch Institute for Vulnerability Disclosure (DIVD) is onlangs gehackt via twee zerodaylekken in helpdesksoftware en ticketsysteem Zammad, zo heeft het zelf bekendgemaakt. Het Nationaal Cyber Secu ... Read more
The following table lists the changes that have been made to the
CVE-2026-102490 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Modified Analysis by [email protected]
Oct. 09, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Removed CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Changed CPE Configuration AND OR *cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* versions from (including) 1.5.0 up to (excluding) 7.1.0 *cpe:2.3:a:zammad:zammad:7.1.0:alpha:*:*:*:*:*:* OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:a:docker:docker:-:*:*:*:*:*:*:* AND OR *cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* versions up to (excluding) 7.2.2 OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:a:docker:docker:-:*:*:*:*:*:*:* Added Reference Type Dutch Institute for Vulnerability Disclosure: https://github.com/zammad/zammad/security/advisories/GHSA-p97w-927q-8vxq Types: Vendor Advisory -
CVE Modified by [email protected]
Oct. 08, 2026
Action Type Old Value New Value Changed Description All versions of Zammad including the latest alpha enable the local zammad user to escalate privileges to root. 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. Added Affected Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/102xxx/CVE-2026-102490.json">CVE-2026-102490</a> Added Reference https://github.com/zammad/zammad/security/advisories/GHSA-p97w-927q-8vxq Removed Reference https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 Removed Reference Type https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 Types: Vendor Advisory -
Modified Analysis by [email protected]
Oct. 07, 2026
Action Type Old Value New Value Added Reference Type Dutch Institute for Vulnerability Disclosure: https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 Types: Vendor Advisory Added Reference Type Dutch Institute for Vulnerability Disclosure: https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490 Types: Vendor Advisory -
CVE Modified by [email protected]
Oct. 07, 2026
Action Type Old Value New Value Added Reference https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 Added Reference https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 03, 2026
Action Type Old Value New Value Removed SSVC {'id': 'CVE-2026-102490', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T16:27:22.630800Z'} Added SSVC {'id': 'CVE-2026-102490', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T00:00:00+00:00'} -
Modified Analysis by [email protected]
Oct. 02, 2026
Action Type Old Value New Value Added Reference Type CISA-ADP: https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102490 Types: US Government Resource -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 02, 2026
Action Type Old Value New Value Added Reference https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102490 Removed SSVC {'id': 'CVE-2026-102490', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T13:39:40.534055Z'} Added SSVC {'id': 'CVE-2026-102490', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'active'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T16:27:22.630800Z'} -
Initial Analysis by [email protected]
Oct. 02, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration AND OR *cpe:2.3:a:zammad:zammad:*:*:*:*:*:*:*:* versions from (including) 1.5.0 up to (excluding) 7.1.0 *cpe:2.3:a:zammad:zammad:7.1.0:alpha:*:*:*:*:*:* OR cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:* cpe:2.3:a:docker:docker:-:*:*:*:*:*:*:* Added Reference Type Dutch Institute for Vulnerability Disclosure: https://csirt.divd.nl/CVE-2026-102490 Types: Third Party Advisory Added Reference Type Dutch Institute for Vulnerability Disclosure: https://csirt.divd.nl/DIVD-2026-00015 Types: Third Party Advisory -
CVE CISA KEV Update by 9119a7d8-5eab-497f-8521-727c672e3725
Oct. 02, 2026
Action Type Old Value New Value Added Date Added 2026-10-02 Added Due Date 2026-10-02 Added Required Action 2026-10-02 Added Vulnerability Name 2026-10-02 -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Oct. 02, 2026
Action Type Old Value New Value Added CWE CWE-269 Added SSVC {'id': 'CVE-2026-102490', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-10-02T13:39:40.534055Z'} -
New CVE Received by [email protected]
Sep. 30, 2026
Action Type Old Value New Value Added Description All versions of Zammad including the latest alpha enable the local zammad user to escalate privileges to root. Added CVSS V4.0 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 Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/102xxx/CVE-2026-102490.json">CVE-2026-102490</a> Added Reference https://csirt.divd.nl/CVE-2026-102490 Added Reference https://csirt.divd.nl/DIVD-2026-00015