CVE-2026-126258
Vulnerability record
- High 7.1
Description
A stack-based buffer overflow vulnerability in Fortinet FortiOS 8.0.0, FortiOS 7.6.7 may allow an unauthenticated attacker with wad port access to crash proxy or ZTNA sessions via crafted HTTP or HTTPS requests.
Key facts
- Published
- 11 Nov 2026
- Last changed
- 12 Nov 2026
- Assigned by
- fortinet
- EPSS
- 0.578% likely to be exploited in the next 30 days, higher than 48.143% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: none; Automatable: yes; Technical impact: partial
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 7.1CVSS 3.1, Highfrom the CNA (fortinet)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
What to do
- Upgrade to FortiOS version 8.0.1 or above Upgrade to FortiOS version 7.6.8 or aboveCNA solution statement
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Fortinet | FortiOS |
|
Timeline
- 11 Nov 2026 Published