Vulnary
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Critical· 9.8

CVE-2026-84390

Fortinet FortiMonitorOnSight software versions 7.2.0‑7.2.2 and 7.2.4‑7.2.7 contain a flaw where sensitive information is embedded in the source code. This can lead to improper access control, potentially allowing attackers to gain unauthorized access. The vulnerability is critical because it requires no authentication and can compromise confidentiality, integrity, and availability.

publishedSep 11, 2026
last modifiedSep 11, 2026
sourcesNVD
severity · cvss
9.8
critical · how bad it is
exploitation · epss
<1%
43th percentile · chance of exploitation in 30 days
(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →
auto-deletes from the system
counting…on Oct 26, 2026

No official fix yet. If none appears within 45 days of first tracking, this entry is removed automatically.

01

Who is affected

Fortinet FortiMonitorOnSight 7.2.0‑7.2.2 and 7.2.4‑7.2.7.

02

Real-world impact

An attacker could exploit the exposed sensitive data to bypass access controls and gain unauthorized access to the FortiMonitorOnSight system, potentially reading or modifying data, or disrupting services.

03

Why this severity

The CVSS score of 9.8 reflects that the flaw can be exploited over the network without authentication, and it can fully compromise confidentiality, integrity, and availability. The high impact and ease of exploitation make it a critical vulnerability.

04

What to do about it

no official fix yet
interim mitigations
  • Monitor Fortinet advisories for a patch.

No official fix or mitigation is documented in the sources yet. Monitor the vendor advisory and apply the patch as soon as it is released.

No fix documented in sources.

05

Timeline

06

How it’s attacked

Attack vectorNetwork (remote)
Attack complexityLow
Privileges requiredNone
User interactionNone needed
ScopeUnchanged
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
07

References & advisories

(ai-assisted) A model wrote this summary from the official data, so double-check it against the source before you act on it. Read the official advisory →