{"id":"CVE-2026-102489","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-102489","generatedAt":"2026-10-23T03:41:54.958Z","title":"Zammad GmbH Zammad Session Fixation Vulnerability","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.","published":"2026-09-30T17:16:41.000Z","lastModified":"2026-10-10T04:18:08.000Z","status":"Analyzed","sourceIdentifier":"csirt@divd.nl","cvss":{"version":"4.0","score":9.4,"severity":"CRITICAL","vector":"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/M"},"cwe":["CWE-384"],"affected":["zammad/zammad"],"epss":{"score":0.01255,"percentile":0.69277,"date":"2026-10-22","history":[{"date":"2026-10-01","score":0.00709,"percentile":0.51763}]},"kev":{"listed":true,"dateAdded":"2026-10-02","dueDate":"2026-10-05","knownRansomwareCampaignUse":"Unknown","notes":"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.\nhttps://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-2026-102489"},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"Known to be exploited in the wild (CISA KEV, CISA remediation deadline 5 October 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise."},"changes":[{"kind":"kev","label":"Added to KEV","at":"2026-10-02T00:00:00.000Z","detail":{"name":"Zammad GmbH Zammad Session Fixation Vulnerability","vendor":"Zammad GmbH","dueDate":"2026-10-05","product":"Zammad","ransomware":"Unknown"},"summary":"Added to CISA KEV — known to be exploited; federal remediation due 2026-10-05."},{"kind":"new","label":"New CVE","at":"2026-09-30T17:16:41.000Z","detail":{"score":"9.4","severity":"CRITICAL","publishedAt":"2026-09-30T17:16:40.550Z"},"summary":"New CVE, critical severity (CVSS 9.4)."}],"references":[{"url":"https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2","tags":["Vendor Advisory"],"source":"csirt@divd.nl"},{"url":"https://csirt.divd.nl/CVE-2026-102489","tags":["Third Party Advisory"],"source":"csirt@divd.nl"},{"url":"https://csirt.divd.nl/DIVD-2026-00015","tags":["Third Party Advisory"],"source":"csirt@divd.nl"},{"url":"https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490","tags":["Vendor Advisory"],"source":"csirt@divd.nl"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489","tags":["US Government Resource"],"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102489","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}