--- title: "CVE-2026-102489: Undisclosed RCE in Zammad v6.3 and higher | CubePath" description: "Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The bug is also…" language: en source: https://cubepath.com/security/cve/CVE-2026-102489 --- # CVE-2026-102489: Undisclosed RCE in Zammad v6.3 and higher | CubePath ## Description Zammad versions 6.3.0 to 6.5.4 are vulnerable a session hijack vulnerability that leads to remote code execution as the zammad user. The bug is also present in version 7.0.0 to version 7.1.2, but not exploitable due to changes in the underlying framework. Official description from the CVE record, published by DIVD. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-102489) ## Key data ### CVSS 4.0 High 8.7 Score published by DIVD in the CVE record. CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/E:A/AU:Y/V:C | Metric | Value | What it means | | ----------------------------------- | ------- | --------------------------------------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No measurable action is needed to get around the system's built-in security controls. The attack is repeatable. | | Attack requirements | None | The attack works without any special deployment or execution conditions. | | Privileges required | None | No account or privileges are needed. | | User interaction | Passive | A user takes part without meaning to, for example by loading a page. | | Vulnerable system: confidentiality | High | Serious or total effect on the secrecy of data. | | Vulnerable system: integrity | High | Serious or total effect on the trustworthiness of data. | | Vulnerable system: availability | High | Serious or total effect on availability. | | Subsequent systems: confidentiality | Low | Limited effect on other systems' data secrecy. | | Subsequent systems: integrity | Low | Limited effect on other systems' data trustworthiness. | | Subsequent systems: availability | Low | Limited effect on other systems' availability. | ### CVSS 4.0 Critical 9.4 Score published by DIVD in the CVE record. 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 | Metric | Value | What it means | | ----------------------------------- | ------- | --------------------------------------------------------------------------------------------------------------- | | Attack vector | Network | The vulnerable component can be reached over a network, possibly from the Internet. | | Attack complexity | Low | No measurable action is needed to get around the system's built-in security controls. The attack is repeatable. | | Attack requirements | None | The attack works without any special deployment or execution conditions. | | Privileges required | None | No account or privileges are needed. | | User interaction | Passive | A user takes part without meaning to, for example by loading a page. | | Vulnerable system: confidentiality | High | Serious or total effect on the secrecy of data. | | Vulnerable system: integrity | High | Serious or total effect on the trustworthiness of data. | | Vulnerable system: availability | High | Serious or total effect on availability. | | Subsequent systems: confidentiality | High | Serious or total effect on other systems' data secrecy. | | Subsequent systems: integrity | High | Serious or total effect on other systems' data trustworthiness. | | Subsequent systems: availability | High | Serious or total effect on other systems' availability. | CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) . ### EPSS Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days. Score 0.49915 (49.9% probability) Percentile 98.9% Scores of Nov 10, 2026 Model v2026.06.15 ### CISA Known Exploited Vulnerabilities This CVE is listed in the CISA KEV catalog. Name in the catalog Zammad GmbH Zammad Session Fixation Vulnerability Added to the catalog Oct 2, 2026 Federal due date Oct 5, 2026 ### CISA assessment as of Oct 2, 2026 Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA. Exploitation Recorded by CISA as active Automatable no Technical impact total ### Weakness (CWE) CWE catalog version 5.0. CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license. - [CWE-384](https://cwe.mitre.org/data/definitions/384.html) Session Fixation ## Affected products Products listed in the CVE record, as the CNA published them. - Zammad - unknown: \* up to before 6.3.0 - affected: 6.3.0 up to before 6.5.4 - unknown: 7.0.0 up to before 7.1.3 ## References Links listed in the CVE record. They lead to other sites, which CubePath does not control. - [csirt.divd.nl/DIVD-2026-00015](https://csirt.divd.nl/DIVD-2026-00015) third-party-advisory - [csirt.divd.nl/CVE-2026-102489](https://csirt.divd.nl/CVE-2026-102489) third-party-advisory - [zammad.com/en/advisories/cve-2026-102489-cve-2026-102490](https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490) vendor-advisory - [community.zammad.org/t/take-care-local-privilege-escalation…](https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2) technical-description ## Timeline 1. ID reserved Sep 29, 2026 2. Record published Sep 30, 2026 3. Added to CISA KEV Oct 2, 2026 4. Record last updated Oct 19, 2026 ## Look up another CVE ## About CubePath CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection. [Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection) Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:08 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)