Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
Fortinet FortiOS — 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 …
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L L N U L N N 4.3 .0019 8.7 —
AFFECTED
Product Versions Fixed
FortiOS 7.6.0 – —
FortiPAM 1.7.0 – —
FortiSwitchManager 7.2.0 – —
FortiProxy 7.6.0 – —
TIMELINE
Jul 7 Reserved by fortinet
Jul 14 Published (CNA: fortinet)
Aug 11 RESCORED — CVE-2026-59840 (Fortinet FortiOS). CVSS 4.1 → 4.3 (NVD).
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>
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| July 7, 2026 | Reserved | Reserved by fortinet |
| July 14, 2026 | Published | Published (CNA: fortinet) |
| August 11, 2026 | RESCORED | RESCORED — CVE-2026-59840 (Fortinet FortiOS). CVSS 4.1 → 4.3 (NVD). |
Affected
Affected products and packages — 4 rows
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| Fortinet | FortiOS | — | 7.6.0 | — |
| Fortinet | FortiPAM | — | 1.7.0 | — |
| Fortinet | FortiSwitchManager | — | 7.2.0 | — |
| Fortinet | FortiProxy | — | 7.6.0 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-59840 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.