CVE-2026-84390 (CVSS 9.8)

Description

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>

Is your site exposed to CVE-2026-84390?

Run a free security scan — no signup, results in seconds.

CVSS v3.1 Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0052

Probability of exploitation

0.43%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-540 CWE-540

References

Other References

https://fortiguard.fortinet.com/psirt/FG-IR-26-170

Frequently Asked Questions

What is CVE-2026-84390? +

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> It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-84390? +

CVE-2026-84390 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0052, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-84390? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

Related Vulnerabilities

CVE-2026-78192

WebDyne versions from 2.022 before 3.022 for Perl disclose application source to unauthenticated clients via the viewer in the default …

CVE-2025-23215

PMD is an extensible multilanguage static code analyzer. The passphrase for the PMD and PMD Designer release signing keys are …

CVE-2025-26013 8.2

An issue in Loggrove v.1.0 allows a remote attacker to obtain sensitive information via the read.py component.

CVE-2026-73591 7.5

Dell Secure Connect Gateway (SCG) Policy Manager, versions prior to 5.34.00.16, contains an Inclusion of Sensitive Information in Source Code …

CVE-2026-45728 7.5

Algernon is a small self-contained pure-Go web server. Prior to 1.17.7, when Algernon is invoked with a single file path …

CVE-2024-1272 7.5

Inclusion of Sensitive Information in Source Code vulnerability in TNB Mobile Solutions Cockpit Software allows Retrieve Embedded Sensitive Data.This issue …