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FortiMonitorOnSight EUVDEUVD-2026-76098

| CVE-2026-84390 CRITICAL
Inclusion of Sensitive Information in Source Code (CWE-540)
2026-09-11 fortinet GHSA-g584-wqjw-m2r8
9.8
CVSS 3.1 · Vendor: fortinet
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Severity by source

Vendor (fortinet) PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
8.2 HIGH

CWE-540 sensitive-info exposure is confidentiality-driven; downstream access-control bypass yields limited integrity impact (I:L) and no availability impact, so C:H/I:H/A:H is overstated.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N

Primary rating from Vendor (fortinet).

CVSS VectorVendor: fortinet

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Updated
Sep 11, 2026 - 13:28 vuln.today
v2 (cvss_changed)
Re-analysis Queued
Sep 11, 2026 - 13:22 vuln.today
cvss_changed
CVSS changed
Sep 11, 2026 - 13:22 NVD
9.6 (CRITICAL) 9.8 (CRITICAL)
Analysis Generated
Sep 11, 2026 - 13:01 vuln.today
CVE Published
Sep 11, 2026 - 12:13 cve.org
CRITICAL 9.6

DescriptionCVE.org

A inclusion of sensitive information in source code vulnerability in Fortinet FortiMonitorOnSight 7.2.4 through 7.2.7, FortiMonitorOnSight 7.2.0 through 7.2.2 may allow attacker to improper access control via <insert attack vector here>

AnalysisAI

Sensitive information embedded in the source code of Fortinet FortiMonitorOnSight (7.2.0-7.2.2 and 7.2.4-7.2.7) can be recovered by an attacker and leveraged to bypass access controls. The exposed data (CWE-540) may include credentials, keys, or other secrets that grant unauthorized access to protected functionality. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Impact
technique details hidden

Vulnerability AssessmentAI

Exploitation Exploitation requires the target to be running FortiMonitorOnSight 7.2.0-7.2.2 or 7.2.4-7.2.7, and hinges on the attacker being able to access the source code or client-side code that contains the embedded sensitive information; the specific attack vector is NOT stated in the CVE (the description literally contains an '<insert attack vector here>' placeholder), so whether network reachability of a management endpoint or possession of a distributed artifact is the true prerequisite cannot be confirmed from the provided data. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The input assigns CVSS 9.8 (AV:N/AC:L/PR:N/UI:N/C:H/I:H/A:H), which is difficult to reconcile with a CWE-540 sensitive-information-in-source-code weakness: such flaws are typically confidentiality-driven, and the full I:H/A:H impact appears overstated absent a described mechanism to modify data or degrade availability. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Consult Fortinet PSIRT advisory FG-IR-26-170 (https://fortiguard.fortinet.com/psirt/FG-IR-26-170) and upgrade to the fixed FortiMonitorOnSight build it specifies; the input data does not include an exact patched version number, so treat the advisory as the source of the fix version rather than inventing one - Patch available per vendor advisory. … Detailed patch versions, workarounds, and compensating controls in full report.

Recommended ActionAI

Within 24 hours: Identify all FortiMonitorOnSight deployments running versions 7.2.0-7.2.7 and map their network exposure; contact Fortinet support immediately for patch status and expected timeline. …

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EUVD-2026-76098 vulnerability details – vuln.today

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