CVE-2026-26084

CRITICAL

A improper access control vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5...

Affects 0 products across 1 vendor.

CVSS 3.19.9
EPSS0.4%
Percentile31th
PatchUnknown
CVSS Vector — Plain English Remotely exploitable over the network, low complexity, no authentication required, no user interaction needed, can impact systems beyond the vulnerable component, full availability impact.
CWE Weakness Definitions
CWE-284: Improper Access Control

Software does not restrict or incorrectly restricts access to a resource.

Related Attack Patterns (CAPEC)
CAPEC-478 Modification of Windows Service Configuration
via CWE-284
CAPEC-479 Malicious Root Certificate
via CWE-284
CAPEC-546 Incomplete Data Deletion in a Multi-Tenant Environment
via CWE-284
CAPEC-550 Install New Service
via CWE-284
CAPEC-551 Modify Existing Service
via CWE-284
Show all 17

Mapping is CWE-to-CAPEC per MITRE CAPEC 3.9.

◆ AI Analysis — automated analysis, not human-reviewed

A critical severity vulnerability (CVE-2026-26084) affects the target system. A improper access control vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow attacker to access sensitive information v...

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Frequently Asked Questions
What is CVE-2026-26084?
A critical severity vulnerability (CVE-2026-26084) affects the target system. A improper access control vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow attacker to access sensitive information v...
What is the CVSS score for CVE-2026-26084?
CVE-2026-26084 has CVSS 9.9 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H. EPSS: 0.4%.
Is CVE-2026-26084 actively exploited?
No confirmed active exploitation of CVE-2026-26084 as of 2026-10-06.
How do I remediate CVE-2026-26084?
Apply vendor patches for CVE-2026-26084. Monitor Fortinet advisories.
What systems are affected by CVE-2026-26084?
CVE-2026-26084 affects: Fortinet.
Vulnerability Details
CVE IDCVE-2026-26084
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H
Published2026-09-08
Last Modified2026-09-08
ICS Relevance70%
Weakness (CWE)
Improper Access Control
SourceNVD
Official Description

A improper access control vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow attacker to access sensitive information via crafted HTTP requests.

Source: NIST NVD / MITRE CVE Database

Affected Products
VendorProductAffected Versions
Fortinet — —
Remediation

No patch URL on record. Monitor vendor security advisories directly.

Threat Intelligence
● Threat Intelligence Validated: October 2026 | Threat Age: 27 Days
CISA known-exploitedNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
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