CVE-2026-59840
A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiProxy 7.6.0 th
Description
A buffer over-read vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2 all versions, FortiOS 7.0 all versions, FortiOS 6.4 all versions, FortiProxy 7.6.0 through 7.6.5, FortiProxy 7.4.0 through 7.4.13, FortiProxy 7.2 all versions, FortiProxy 7.0 all versions may allow attacker to information disclosure via <insert attack vector here>
Weakness: CWE-126
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Fortinet | FortiOS Check your version | Firewall / NGFW | cna-assigner |
| Fortinet | FortiPAM | Identity / IAM / MFA | cna-assigner |
| Fortinet | FortiProxy Check your version | SASE / SSE / Secure Web | cna-assigner |
| Fortinet | FortiSwitch | Routing & Switching | cna-assigner |
Vendor-reported products (5)
- Fortinet · FortiOS
- Fortinet · FortiPAM
- Fortinet · FortiSwitchManager
- Fortinet · FortiProxy
- Siemens · RUGGEDCOM APE1808
Credit
Fortinet is pleased to thank Vang3lis and Cyth from VARAS@IIE for reporting this vulnerability under responsible disclosure.
Vendor remediation
Upgrade to FortiOS version 7.6.4 or above Upgrade to FortiOS version 7.4.9 or above Fortinet remediated this issue in FortiSASE version 25.4.b and hence customers do not need to perform any action. Upgrade to FortiProxy version 7.6.6 or above Upgrade to FortiProxy version 7.4.14 or above