NVD / CVE Program· CNA fortinet

CVE-2026-25089: A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 5.0.0 th

Noroxi assessment

Priority: Now (action score 92/100)

CISA has confirmed exploitation in the wild (Jul 16, 2026). Remediation deadline for US federal agencies: Jul 19, 2026.
Probability of exploitation in the next 30 days: 76.1% (FIRST EPSS); higher than 99.5% of all records.
Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
According to CISA the attack is automatable: targets can be found by mass scanning.
According to the record, no fixed version is available yet.

Patch today or shut off access. Until a fix is released, restrict access to the affected component and follow the vendor's advisory.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · CISA KEV · FIRST EPSS

A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox 4.2 all versions, FortiSandbox Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow an unauthenticated attacker to execute unauthorized commands via specifically crafted HTTP requests

CriticalCVSS 9.8 · v3.1KEVWeaponized No fix recorded

BDU:2026-08316

Published: Jun 9, 2026
Updated: Jul 23, 2026
EPSS: 76.1% · 99th percentile
CWE: CWE-78

Report tools

JSON

Action score

Now

Patch today or shut off access.

CVSS: 39 / 40 · 9.8 / 10
CISA KEV: 30 / 30 · Listed
EPSS: 23 / 30 · 76.1%

CISA SSVC decision

Exploitation: active
Automatable: yes
Technical impact: total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: —
CNA · fortinet: 9.1; NVD has not scored this yet; the score shown is the CNA’s.

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Jul 16, 2026. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Jul 19, 2026.

Get told when this record changes

In CISA KEV: exploitation in the wild confirmed
Weaponized exploit exists
No fixed version yet

If any of these changes, we'll tell you in the daily email digest.

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
fortinet	fortisandbox	cpe:2.3:a:fortinet:fortisandbox
fortinet	fortisandbox cloud	cpe:2.3:a:fortinet:fortisandbox_cloud
fortinet	fortisandbox paas	cpe:2.3:a:fortinet:fortisandbox_paas

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

fortinet fortisandbox4.2.0 and later · up to 4.2.8 inclusive
fortinet fortisandbox4.4.0 and later · before 4.4.9
fortinet fortisandbox5.0.0 and later · before 5.0.6
fortinet fortisandbox cloud5.0.4 and later · before 5.0.6
fortinet fortisandbox paas5.0.4 and later · before 5.0.6

Versions reported by the vendor

Affected version ranges reported by the assigning authority (fortinet). Independent of NVD's CPE analysis and usually ahead of it.

Fortinet FortiSandbox
- 5.0.0 and later · up to and including 5.0.5affected · semver
- 4.4.0 and later · up to and including 4.4.8affected · semver
- 4.2.1 and later · up to and including 4.2.8affected · semver
Fortinet FortiSandbox Cloud
- 5.0.4 and later · up to and including 5.0.5affected · semver
Fortinet FortiSandbox PaaS
- 5.0.4 and later · up to and including 5.0.5affected · semver

Same product

fortinet: all records

Other highest-scoring records for the same primary product.

CVE-2026-39808A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 thKEV
97Now
CVE-2026-39813A path traversal: '../filedir' vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8 may allow attack
46Plan
CVE-2024-27781An improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Fortinet FortiSandbox 4.4.0 through
44Plan

Published before and after this one in the same product

← EarlierCVE-2026-39812Apr 14, 2026 · A improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Fortinet FortiSandbox 5.0.0 through
19Monitor
← EarlierCVE-2026-26083May 12, 2026 · A missing authorization vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.1, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox 4.2 all v
39Monitor
Later →CVE-2026-59835Jul 14, 2026 · A exposure of resource to wrong sphere vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.3 through 4.4.8 may allo
34Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

No fix version is recorded for this entry. Check the references for vendor advisories.

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

Proof-of-concept repository on GitHub ×2

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
Source	Kind	Date
Proof-of-concept repository on GitHub	stars:6	2026-06-10
Proof-of-concept repository on GitHub	stars:3	2026-06-12

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

PublishedJun 9, 2026
First PoCJun 10, 2026same day
CISA KEVJul 16, 2026+36 d
TodayNov 7, 2026+151 d

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2026-3980856 days apartA improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 thKEV
97Now
CVE-2025-53949182 days apartAn Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection') vulnerability [CWE-78] vulnerability in Fortin
40Plan
CVE-2024-52961455 days apartAn improper neutralization of special elements used in an OS Command vulnerability [CWE-78] vulnerability in Fortinet FortiSandbox 5.0.0, Fo
35Monitor
CVE-2024-27778511 days apartAn improper neutralization of special elements used in an OS Command vulnerability [CWE-78] vulnerability in Fortinet FortiSandbox 4.4.0 thr
35Monitor
CVE-2025-53679182 days apartAn improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability [CWE-78] vulnerability in Fortin
32Monitor
CVE-2024-54018455 days apartMultiple improper neutralization of special elements used in an OS Command vulnerabilities [CWE-78] in FortiSandbox before 4.4.5 allows a pr
31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Anyone who can reach it over the internet can trigger it.
No account or password is required.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSS vector

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

nvd-secondary

Root cause

User input is inserted as text into a shell command. The shell may interpret special characters in the input as part of the command.

The bug in code

The whole CWE-78 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1const host = req.body.host;
2exec("ping -c 1 " + host, onResult);

Fixed

1const host = req.body.host;
2if (!/^[a-z0-9.-]{1,253}$/i.test(host)) return res.sendStatus(400);
3execFile("ping", ["-c", "1", host], onResult);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

Attack patterns (CAPEC)

ATT&CK techniques

—

Change log

No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.

References

fortiguard.fortinet.com/psirt/FG-IR-26-141

Show all references (1 more)

www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-25089

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records