CVE-2026-102489

What it is

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.

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.

In the wild

CISA lists this as exploited in real attacks. Treat as urgent.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-09-29 09:46 UTC ReservedThe CVE id was reserved by its CNA
2. 2026-09-30 17:16 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-10-02 Exploited in the wildAdded to CISA's Known Exploited Vulnerabilities list
4. 2026-10-05 Remediation deadlineCISA's due date for federal agencies to fix it
5. 2026-10-10 04:18 UTC Last updatedMost recent change to the record

Details

Published

2026-09-30 17:16 UTC

Last modified

2026-10-10 04:18 UTC

Added to CISA KEV

2026-10-02

Exploit probability

22.5% · EPSS, next 30 days

Weakness

CWE-384

Record status

Analyzed

Affected

• Zammad ≤ 6.5.4

Attack profile CVSS 4.0 · 9.4

Attack vector

Network

Complexity

Low

Attack requirements

None

Privileges needed

None

User interaction

Passive

Confidentiality

High

Integrity

High

Availability

High