CVE-2026-26083

Description

A missing authorization vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.1, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.2 through 5.0.5, FortiSandbox PaaS 23.4 all versions, FortiSandbox PaaS 23.3 all versions, FortiSandbox PaaS 23.1 all versions, FortiSandbox PaaS 22.2 all versions, FortiSandbox PaaS 22.1 all versions, FortiSandbox PaaS 21.4 all versions, FortiSandbox PaaS 21.3 all versions, FortiSandbox PaaS 5.0.0 through 5.0.1, FortiSandbox PaaS 4.4.5 through 4.4.8 may allow an unauthenticated attacker to execute unauthorized code or commands via HTTP requests.

Overview

State: PUBLISHED
Assigner (CNA): fortinet
CVSS severity: CRITICAL
CVSS score: 9.1 / 10
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
Effective score: 9.1 / 10 CRITICAL source: CNA overview
CWE(s): CWE-862
Reserved: 2026-02-11
Published: 2026-05-12 18:54 UTC
Last updated: 2026-05-13 05:58 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/26xxx/CVE-2026-26083.json
Linked Threat: CVE-2026-26083 — CVE-2026-26083

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-05-12 18:16:39 UTC
NVD last modified: 2026-05-15 13:42:07 UTC
NVD CVSS v3.1: 9.8 / 10 CRITICAL source: psirt@fortinet.com
NVD CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Exploitability subscore: 3.9 / 10
Impact subscore: 5.9 / 10
EPSS score: 0.0006 (probability of exploitation in next 30 days)
EPSS percentile: 19.95% vs all CVEs — higher = more likely to be exploited, as of 2026-05-25

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-29550
Assigner: fortinet
Published: May 12, 2026, 4:54:04 PM
Updated: May 13, 2026, 3:58:29 AM
EUVD base score (CVSS 3.1): 9.1 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C
EUVD-reported EPSS: 0.0600
Vendors: Fortinet
Products: FortiSandbox PaaS (22.2.4134)

FortiSandbox PaaS (23.4.4350)

FortiSandbox (4.2.1 ≤4.2.8)

FortiSandbox Cloud (5.0.0 ≤5.0.1)

FortiSandbox Cloud (4.4.5 ≤4.4.8)

FortiSandbox PaaS (21.3.4055)

FortiSandbox PaaS (22.2.4151)

FortiSandbox PaaS (23.3.4329)

FortiSandbox (4.4.0 ≤4.4.8)

FortiSandbox PaaS (4.4.5 ≤4.4.8)

FortiSandbox PaaS (21.4.4072)

FortiSandbox (5.0.0 ≤5.0.1)

FortiSandbox PaaS (5.0.0 ≤5.0.1)

FortiSandbox PaaS (22.1.4113)

FortiSandbox PaaS (23.4.4374)

FortiSandbox PaaS (23.1.4245)

ENISA description: A missing authorization vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.1, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.2 through 5.0.5, FortiSandbox PaaS 23.4 all versions, FortiSandbox PaaS 23.3 all versions, FortiSandbox PaaS 23.1 all versions, FortiSandbox PaaS 22.2 all versions, FortiSandbox PaaS 22.1 all versions, FortiSandbox PaaS 21.4 all versions, FortiSandbox PaaS 21.3 all versions, FortiSandbox PaaS 5.0.0 through 5.0.1, FortiSandbox PaaS 4.4.5 through 4.4.8 may allow an unauthenticated attacker to execute unauthorized code or commands via HTTP requests.

EUVD references (1)

https://fortiguard.fortinet.com/psirt/FG-IR-26-136

Affected products (3)

Vendor	Product	Versions	Platforms
Fortinet	FortiSandbox Cloud	`5.0.0` (affected), `4.4.5` (affected)	—
Fortinet	FortiSandbox	`5.0.0` (affected), `4.4.0` (affected), `4.2.1` (affected)	—
Fortinet	FortiSandbox PaaS	`23.4.4374` (affected), `23.4.4350` (affected), `23.3.4329` (affected), `23.1.4245` (affected), `22.2.4151` (affected), `22.2.4134` (affected), `22.1.4113` (affected), `21.4.4072` (affected), `21.3.4055` (affected), `5.0.0` (affected), `4.4.5` (affected)	—

Affected products — CPE 2.3 (4) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

cpe:2.3:a:fortinet:fortisandbox:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisandbox_cloud:*:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisandbox_cloud:24.1.4436:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisandbox_paas:*:*:*:*:*:*:*:*

Vendor references (1)

References embedded in the original CVE record by the assigning CNA.

https://fortiguard.fortinet.com/psirt/FG-IR-26-136

MITRE references (1) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

https://fortiguard.fortinet.com/psirt/FG-IR-26-136

Web references (7)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

https://www.securityweek.com/fortinet-ivanti-patch-critical-vulnerabilities/ tenable:www.securityweek.com
https://nvd.nist.gov/vuln/detail/CVE-2026-26083 tenable:nvd.nist.gov
https://securityaffairs.com/192047/security/critical-fortinet-vulnerabilities-fixed-in-fortisandbox-and-fortiauthenticator.html tenable:securityaffairs.com
https://thehackernews.com/2026/05/ivanti-fortinet-sap-vmware-n8n-patch.html tenable:thehackernews.com
https://www.bleepingcomputer.com/news/security/fortinet-warns-of-critical-rce-flaws-in-fortisandbox-and-fortiauthenticator/ tenable:www.bleepingcomputer.com
https://www.cve.org/CVERecord?id=CVE-2026-26083 tenable:www.cve.org
https://www.first.org/epss/ tenable:www.first.org

NVD-tagged references (1)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://fortiguard.fortinet.com/psirt/FG-IR-26-136 psirt@fortinet.com Vendor Advisory

Remediations (10)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

CVE-2026-26083 - Vulnerability Details - OpenCVE

web:app.opencve.io

The flaw affects Fortinet FortiSandbox versions 4.4.0 to 4.4.8 and 5.0.0 to 5.0.1, FortiSandbox Cloud versions 5.0.2 to 5.0.5, and all FortiSandbox PaaS releases from 21.3 up through 23.4, including the 5.0.x and 4.4.x lines. Administrators should verify the firmware or software version of their sandbox deployments against these ranges to determine exposure.

2026-05-22 16:13 UTC
Fortinet Critical RCE Vulnerabilities in FortiSandbox and ...

web:aviatrix.ai

Fortinet has disclosed critical RCE vulnerabilities in FortiSandbox and FortiAuthenticator, urging immediate updates to mitigate potential exploitation risks.

2026-05-22 16:13 UTC
CVE-2026-26083 - GitHub Advisory Database

web:github.com

GitHub is where people build software. More than 150 million people use GitHub to discover, fork, and contribute to over 420 million projects.

2026-05-22 16:13 UTC
CVE-2026-44277 & CVE-2026-26083: Critical Fortinet RCE Flaws

web:op-c.net

Fortinet has patched CVE - 2026 -44277 and CVE-2026-26083 , two critical vulnerabilities that may allow unauthenticated code execution in FortiAuthenticator and FortiSandbox.

2026-05-22 16:13 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-22 16:13 UTC
Critical Fortinet vulnerabilities fixed in FortiSandbox and ...

web:securityaffairs.com

Fortinet patched critical flaws in FortiSandbox and FortiAuthenticator that could let attackers remotely execute code on unpatched systems.

2026-05-22 16:13 UTC
Critical Patches Issued for Microsoft Products, April 14, 2026

web:www.cisecurity.org

<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...

2026-05-22 16:13 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-22 16:13 UTC
CVE-2026-26083 - Tenable

web:www.tenable.com

A missing authorization vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.1, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.2 through 5.0.5 ...

2026-05-22 16:13 UTC
Patch Tuesday May 2026: Security Updates & CVE Analysis

web:zecurit.com

Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

2026-05-22 16:13 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-26083.json.

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          "value": "Fortinet remediated this issue in FortiSandbox Cloud version 5.0.2 and hence customers do not need to perform any action.\nFortinet remediated this issue in FortiSandbox Cloud version 4.4.9 and hence customers do not need to perform any action.\nUpgrade to FortiSandbox version 5.0.2 or above\nUpgrade to FortiSandbox version 4.4.9 or above\nUpgrade to FortiSandbox PaaS version 5.0.2 or above\nUpgrade to FortiSandbox PaaS version 4.4.9 or above"
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