# CVE-2026-102489 — Zammad **CISA KEV** > As of 2026-10-09, CVE-2026-102489 is a High-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in Zammad, CVSS v4.0 8.7, EPSS 1.2% (68.6th percentile). It is listed in the CISA Known Exploited Vulnerabilities catalog (added 2026-10-02), with a US federal remediation deadline of 2026-10-05. Threadlinqs Intelligence links 1 tracked threat campaign to CVE-2026-102489, most recently “CISA adds two Zammad vulnerabilities to KEV: CVE-2026-102489 (session fixation to RCE) and CVE-2026-102490 (local privilege escalation to root), chained in an agentic-AI attack on DIVD”. **Last updated:** 2026-10-09 ## What is CVE-2026-102489? 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. The record classifies CVE-2026-102489 under weakness class [CWE-384](https://intel.threadlinqs.com/cwe/CWE-384). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 24 days ago. ## Severity and exploitation probability - **CVSS v4.0 base score:** 8.7 — High (derived from score) (`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`) - **EPSS (FIRST):** 1.2% probability of exploitation in the next 30 days, higher than 68.6% of all scored CVEs - **CISA KEV:** Listed since 2026-10-02, federal remediation deadline 2026-10-05 - **Threadlinqs priority:** 9/10 — CISA KEV-listed, which Threadlinqs floors at 9 - **Published:** 2026-09-30, last modified 2026-10-09 ## Is CVE-2026-102489 being exploited? CISA added CVE-2026-102489 to the Known Exploited Vulnerabilities catalog on 2026-10-02, which means the agency holds evidence of exploitation in the wild; US federal civilian agencies had to remediate it by 2026-10-05 under BOD 22-01. Weaponised exploit code for CVE-2026-102489 is publicly available. 2 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 68 in the Threadlinqs vulnerability feed. - [horizon3ai/CVE-2026-102489](https://github.com/horizon3ai/CVE-2026-102489) (github) - [Hunt-Benito/the-cookie-in-the-error-message-cve-2026-102489-zammad-session-hijack-to-rce](https://github.com/Hunt-Benito/the-cookie-in-the-error-message-cve-2026-102489-zammad-session-hijack-to-rce) (github) ## Affected products and versions - **Zammad GmbH**: Zammad ## How to fix CVE-2026-102489 Because CVE-2026-102489 is KEV-listed, US federal civilian agencies were required to apply the vendor fix, or stop using the product, by 2026-10-05. No vendor patch reference has been recorded for CVE-2026-102489 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise. ## Threat activity tracking CVE-2026-102489 1 tracked threat in the Threadlinqs corpus references CVE-2026-102489, either in the campaign’s CVE list or as an indicator on the campaign record. - [CISA adds two Zammad vulnerabilities to KEV: CVE-2026-102489 (session fixation to RCE) and CVE-2026-102490 (local privilege escalation to root), chained in an agentic-AI attack on DIVD](https://intel.threadlinqs.com/threat/TL-2026-2843) — CRITICAL · 2026-10-02 ## Sources Enriched from CVE.org, FIRST EPSS, CISA KEV, GitHub Security Advisories, public proof-of-concept repositories. Last verified by Threadlinqs on 2026-10-10. **Vendor advisory and patch** - [zammad.com — vendor advisory](https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490) **Technical analysis** - [community.zammad.org — technical description](https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2) **Third-party advisory** - [csirt.divd.nl — third party advisory](https://csirt.divd.nl/DIVD-2026-00015) - [csirt.divd.nl — third party advisory (CVE 2026 102489)](https://csirt.divd.nl/CVE-2026-102489) Canonical: https://intel.threadlinqs.com/cve/CVE-2026-102489 Full detection coverage and IOCs for threats exploiting CVE-2026-102489 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp