FortiOS
CVE-2026-59840: Buffer over-read in FortiOS, FortiPAM and others
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>
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| FortiOS 7.6.0 to 7.6.3 | 7.6.4 or later |
| FortiOS 7.4.0 to 7.4.8 | 7.4.9 or later |
| FortiOS 7.2.0 to 7.2.13 | Upgrade past 7.2.13; see the advisory |
| FortiOS 7.0.0 to 7.0.19 | Upgrade past 7.0.19; see the advisory |
| FortiOS 6.4.0 to 6.4.16 | Upgrade past 6.4.16; see the advisory |
| FortiPAM 1.7 | See the advisory |
| FortiPAM 1.6.0 to 1.6.2 | Upgrade past 1.6.2; see the advisory |
| FortiPAM 1.5.0 to 1.5.1 | Upgrade past 1.5.1; see the advisory |
| FortiPAM 1.4.0 to 1.4.3 | Upgrade past 1.4.3; see the advisory |
| FortiPAM 1.3.0 to 1.3.1 | Upgrade past 1.3.1; see the advisory |
| FortiPAM 1.2 | See the advisory |
| FortiPAM 1.1.0 to 1.1.2 | Upgrade past 1.1.2; see the advisory |
| FortiPAM 1.0.0 to 1.0.3 | Upgrade past 1.0.3; see the advisory |
| FortiSwitchManager 7.2.0 to 7.2.7 | Upgrade past 7.2.7; see the advisory |
| FortiSwitchManager 7.0.0 to 7.0.6 | Upgrade past 7.0.6; see the advisory |
| FortiProxy 7.6.0 to 7.6.5 | 7.6.6 or later |
| FortiProxy 7.4.0 to 7.4.13 | 7.4.14 or later |
| FortiProxy 7.2.0 to 7.2.16 | Upgrade past 7.2.16; see the advisory |
| FortiProxy 7.0.0 to 7.0.23 | Upgrade past 7.0.23; see the advisory |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
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>
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 10 Oct 2026.