A out-of-bounds write vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, For…
- Severity
- High8.8CVSS 3.1, High
- EPSS
- 0.56%
- Published
- 12 May 2026
- Updated
- 11 Aug 2026
Description
Title, description and vendor guidance are quoted from the source records.
A out-of-bounds write vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11 allows attacker to execute unauthorized code or commands via specially crafted packets.
Weakness: CWE-787
Known exploited
Not listed in CISA KEV as of the last check.
Exploit prediction
0.56% probability of exploitation in the next 30 days (percentile 45%).
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
What the source states, per branch
Versions matched by Patcharo
Fortinet FortiOSSource: Fortinet (CVE record)
| Branch | Affected | Fixed in |
|---|---|---|
| 7.6 | 7.6.0 – 7.6.3 | Fixed after 7.6.3 |
| 7.4 | 7.4.0 – 7.4.8 | Fixed after 7.4.8 |
| 7.2 | 7.2.0 – 7.2.11 | Fixed after 7.2.11 |
| 7.0 | 7.0.0 – 7.0.17 | Fixed after 7.0.17 |
| 6.4 | 6.4.0 – 6.4.16 | Fixed after 6.4.16 |
| 6.2 | 6.2.0 – 6.2.17 | Fixed after 6.2.17 |
| 6.0 | 6.0.0 – 6.0.18 | Fixed after 6.0.18 |
Versions not listed are stated unaffected by the vendor.
Workaround / Vendor remediation
Vendor remediation · FortiOS
Upgrade to FortiOS version 7.6.4 or above Upgrade to FortiOS version 7.4.9 or above Upgrade to FortiOS version 7.2.12 or above Upgrade to FortiOS version 7.0.18 or above Fortinet remediated this issue in FortiSASE version 25.3.a and hence customers do not need to perform any action. Upgrade to FortiSwitchManager version 7.2.7 or above Upgrade to FortiSwitchManager version 7.0.6 or above Fortinet remediated this issue in FortiEdgeCloud version 25.3 and hence customers do not need to perform any action.
References
Provenance
Every fact on this page comes from the sources below. Nothing is written by an AI.
- Fortinet (CVE record)
- Fortinet (CVE record) · 27 Sept 2026, 23:46 UTC · Parser patcharo-cve5/1.1.0
- NVD
- NVD · 27 Sept 2026, 23:44 UTC · Parser patcharo-nvd/1.0.0
- FIRST EPSS
- FIRST EPSS · 27 Sept 2026, 23:46 UTC · Parser patcharo-epss/1.0.0
Last verified: 28 Sept 2026, 02:31 UTC