critical Known exploitedREV. 01
CVE-2025-25249Fortinet FortiOS — Heap Overflow RCE via Crafted Packets
A heap-based buffer overflow in Fortinet FortiOS, FortiSwitchManager and FortiSASE lets a remote attacker with no credentials send specially crafted packets to run arbitrary code or commands on the device. Exploitation in the wild has been observed.
Read the risk
THE VITAL STATS- CVSS score
- 9.8/ 10 CVSS v3.1
- EPSS probability
- 2% Likelihood of exploitation
- Attack complexity
- Low Conditions needed to exploit
- Known exploited
- Yes — CISA KEV
- CVE published
- 2026-01-13
- Added to KEV
- 2026-09-09
- Exploit published
- Yes
- Confidence
- high
- Kill chain
- initial access
- MITRE ATT&CK
- T1190
- 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 vulnerable Fortinet device
Behind the card
5 REFERENCES- 01CVE recordNVD recordnvd.nist.gov
- 02CISACISA Known Exploited Vulnerabilities catalogcisa.gov
- 03Vendor advisoryfortiguard.fortinet.comfortiguard.fortinet.com
- 04Exploitsocradar.iosocradar.io
- 05Writeupcert-portal.siemens.comcert-portal.siemens.com
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, references, published_at | nvd.nist.gov | 2026-09-20 | scrty-crds-pipeline/0.1 | high |
| exploitation.known_exploited, exploitation.kev_added | cisa.gov | 2026-09-20 | scrty-crds-pipeline/0.1 | high |
| epss | api.first.org | 2026-09-20 | scrty-crds-pipeline/0.1 | high |
| title, summary, severity, remediation, mitre_attack, kill_chain, recommended_action, confidence, tags, exploitation.prerequisites | nvd.nist.gov | 2026-09-20 | claude-code | high |
Printing history
THE RECORD- r1Initial base card
First printing. This card has not been reprinted since publication.