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CVE-2026-40688

HIGH
7.2
CVSS Score
Published: April 14, 2026 at 10:35 PM UTC
Updated: July 24, 2026 at 09:20 PM UTC
1 product affected across 1 vendorFortiWeb

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Severity
HIGH7.2
Exploit prediction
EPSS 6%
SSVC
No known exploit

Description

A out-of-bounds write vulnerability in Fortinet FortiWeb 8.0.0 through 8.0.3, FortiWeb 7.6.0 through 7.6.6, FortiWeb 7.4.0 through 7.4.11 may allow attacker to execute unauthorized code or commands via <insert attack vector here>

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

FortiWeb· Fortinet
95%
7.4.0 ≤ v ≤ 7.4.117.4.0 ≤ v < 7.4.127.6.0 ≤ v ≤ 7.6.67.6.0 ≤ v < 7.6.78.0.0 ≤ v ≤ 8.0.38.0.0 ≤ v < 8.0.47.4.07.4.17.4.107.4.117.4.27.4.37.4.47.4.57.4.67.4.77.4.87.4.97.6.07.6.17.6.27.6.37.6.47.6.57.6.68.0.08.0.18.0.28.0.3
Affected range stops below 7.4.12, so it looks safe — our inference, not a vendor statement
Affected range stops below 7.6.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 8.0.4, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: cverecord
https://fortiguard.fortinet.com/psirt/FG-IR-26-127

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.2HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-787

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