critical Known exploitedREV. 01
CVE-2026-102489Zammad — Session Fixation to RCE
A session hijack flaw in Zammad 6.3.0 to 6.5.4 leads to RCE as the zammad user. Versions 7.0.0 to 7.1.2 contain the bug but it cannot be exploited there. It can be chained with CVE-2026-102490 to reach root.
Read the risk
THE VITAL STATS- CVSS score
- 9.8/ 10 CVSS v3.1
- EPSS probability
- 22.5% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2026-09-30
- Added to KEV
- 2026-10-02
- CISA due date
- 2026-10-05
- Exploit published
- Not recorded
- Confidence
- high
- Kill chain
- initial access
- MITRE ATT&CK
- —
- Severity
- critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attacker needsNetwork access to a Zammad 6.3.0 to 6.5.4 instance.
Behind the card
5 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02CISACISA Known Exploited Vulnerabilities catalogcisa.gov
- 03Vendor advisorycommunity.zammad.orgcommunity.zammad.org
- 04Vendor advisoryzammad.comzammad.com
- 05Writeupcsirt.divd.nlcsirt.divd.nl
Field-level provenanceTRACE THE SOURCES +
Which source supports each field, when it was retrieved, and who extracted it.
| Fields | Source | Retrieved | Extractor | Confidence |
|---|---|---|---|---|
| cvss, exploitation.attack_complexity, exploitation.exploit_available, published_at, references | nvd.nist.gov | 2026-11-05 | scrty-crds-pipeline/0.1 | high |
| exploitation.known_exploited, exploitation.kev_added, exploitation.kev_due | cisa.gov | 2026-11-05 | scrty-crds-pipeline/0.1 | high |
| epss | api.first.org | 2026-11-05 | scrty-crds-pipeline/0.1 | high |
| title, subtitle, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisites | nvd.nist.gov | 2026-11-05 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
History unavailable — this build has no Git history for the card file.