Reference page — cumulative record through Monday, October 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-102489

CVE-2026-102489CRITICAL

Zammad GmbH Zammad — Undisclosed RCE in Zammad v6.3 and higher

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   P   H   H   H    9.4   .0126   69.0   YES

AFFECTED
  Product  Versions  Fixed
  Zammad   6.3.0 –   —

TIMELINE
  Sep 29  Reserved by DIVD
  Sep 30  Published (CNA: DIVD)
  Oct 2   ADDED TO KEV — CVE-2026-102489 (Zammad GmbH Zammad). Remediation due October 5, 2026.
  Oct 6   DUE DATE PASSED — CVE-2026-102489 (Zammad GmbH Zammad). CISA remediation deadline was October 5, 2026; still in catalog.

CWE-384 · CNA: DIVD · CVSS v4.0 · 5 references · NVD status: Analyzed · KEV due October 5, 2026

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
September 29, 2026	Reserved	Reserved by DIVD
September 30, 2026	Published	Published (CNA: DIVD)
October 2, 2026	KEV ADDED	ADDED TO KEV — CVE-2026-102489 (Zammad GmbH Zammad). Remediation due October 5, 2026.
October 6, 2026	DUE DATE PASSED	DUE DATE PASSED — CVE-2026-102489 (Zammad GmbH Zammad). CISA remediation deadline was October 5, 2026; still in catalog.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
Zammad GmbH	Zammad	—	6.3.0	—

Weaknesses

CWE-384

References (5)

https://community.zammad.org/t/take-care-local-privilege-escalation-cve-2026-102490-is-reported-as-being-actively-exploited/21297/2 [technical-description]
https://csirt.divd.nl/CVE-2026-102489 [third-party-advisory]
https://csirt.divd.nl/DIVD-2026-00015 [third-party-advisory]
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-102489 [government-resource]
https://zammad.com/en/advisories/cve-2026-102489-cve-2026-102490 [vendor-advisory]

Authoritative record: CVE-2026-102489 at cve.org

Vendors: zammad

Weaknesses: CWE-384

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-102489 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Monday, October 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.