A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7…
- Severity
- High7.2CVSS 3.1, High
- EPSS
- 1%
- Published
- 10 Feb 2026
- Updated
- 17 Jun 2026
Description
Title, description and vendor guidance are quoted from the source records.
A use of externally-controlled format string vulnerability in Fortinet FortiOS 7.6.0 through 7.6.4, FortiOS 7.4.0 through 7.4.9, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0 all versions allows an authenticated admin to execute unauthorized code or commands via specifically crafted configuration.
Weakness: CWE-134
Known exploited
Not listed in CISA KEV as of the last check.
Exploit prediction
1% probability of exploitation in the next 30 days (percentile 72%).
CVSS:3.1/AV:N/AC:L/PR:H/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 – 7.6.4 | Fixed after 7.6.4 |
| 7.4 | 7.4.0 – 7.4.9 | Fixed after 7.4.9 |
| 7.2 | 7.2.0 – 7.2.11 | Fixed after 7.2.11 |
| 7.0 | 7.0.0 – 7.0.19 | Fixed after 7.0.19 |
Versions not listed are stated unaffected by the vendor.
Workaround / Vendor remediation
Vendor remediation · FortiOS
Upgrade to FortiOS version 7.6.5 or above Upgrade to FortiOS version 7.4.10 or above Upgrade to FortiProxy version 7.6.5 or above Upgrade to FortiPAM version 1.7.2 or above Upgrade to FortiSwitchManager version 7.2.8 or above Fortinet remediated this issue in FortiSASE version 25.4.c (not released) 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