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This vulnerability allows remote attackers to execute arbitrary code on affected installations of Fortinet FortiSandbox. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.2. The following CVEs are assigned: CVE-2026-84387.

First published (updated )
Advisory
ZDI-26-645

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Fortinet FortiSandbox. Authentication is required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.2. The following CVEs are assigned: CVE-2026-84387.

First published (updated )
Severity
9.9
AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:H/E:P/RL:O/RC:C

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.

First published (updated )
Severity
7.2
Command Injection
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

A improper neutralization of special elements used in a command ('command injection') vulnerability in Fortinet FortiSandbox 5.2.0, FortiSandbox 5.0.0 through 5.0.6, FortiSandbox 4.4.0 through 4.4.9 may allow attacker to execute unauthorized code or commands via <insert attack vector here>

First published (updated )
Severity
8.1
EPSS
71.47%
Race Condition, Input Validation, Integer Overflow, Buffer Overflow
AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

A security regression (CVE-2006-5051) was discovered in OpenSSH's server (sshd). There is a race condition which can lead sshd to handle some signals in an unsafe manner. An unauthenticated, remote attacker may be able to trigger it by failing to authenticate within a set time period.

1 / 36
Source: MITRE
First published (updated )
Severity
9.8
Command Injection, OS Command Injection
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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

1 / 2
Source: NVD
First published (updated )
Severity
9.8
Command Injection, OS Command Injection
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiSandbox 4.4.0 through 4.4.8 may allow attacker to execute unauthorized code or commands via <insert attack vector here>

1 / 3
Source: NVD
First published (updated )
Severity
8.6
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:L

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 allow an unauthenticated attacker to access the VNC server of VMs performing scanning via network requests.

First published (updated )

Fortinet has disclosed CVE-2026-59835, an unauthenticated VNC exposure affecting FortiSandbox 5.0.0 - 5.0.2 and 4.4.3 - 4.4.8. The flaw can allow remote attackers to access the VNC server of virtual machines performing malware analysis via network requests, potentially exposing live sandbox sessions. Patches have been released by Fortinet on 14 July, and organizations using affected versions should update as soon as possible

First published (updated )
Social
reddit
Severity
9.8
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

A missing authorization vulnerability [CWE-862] in FortiSandbox, FortiSandbox Cloud and FortiSandbox PaaS WEB UI may allow an unauthenticated attacker to execute unauthorized code or commands via HTTP requests.

1 / 2
Source: FortiGuard
First published (updated )
Severity
5.4
XSS
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N

An improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Fortinet FortiSandbox 4.4.0 through 4.4.2, FortiSandbox 4.2 all versions, FortiSandbox 4.0 all versions, FortiSandbox 3.2 all versions, FortiSandbox 3.1 all versions allows attacker to execute unauthorized code or commands via crafted HTTP requests

First published (updated )
Severity
7.5
EPSS
23.44%
Input Validation, Double Free, Use After Free
AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A malicious client may keep sending such packages, leading to an uncontrolled increase in memory consumption on the server side. Consequently, the server may become unavailable, resulting in a denial of service attack.

1 / 36
Source: F5
First published (updated )
Severity
9.8
Path Traversal
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

A Path Traversal vulnerability [CWE-24] in FortiSandbox JRPC API may allow an unauthenticated attacker to bypass authentication via specially crafted HTTP requests.

1 / 2
Source: FortiGuard
First published (updated )
Severity
5.3
Infoleak
AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

A fundamental design flaw within the RADIUS protocol has been proven to be exploitable, compromising the integrity in the RADIUS Access-Request process. The attack allows a malicious user to modify packets in a way that would be indistinguishable to a RADIUS client or server. To be successful, the attacker must have the ability to inject themselves between the client and server.

1 / 6
Source: FortiGuard

Remedy

Disable the use of RADIUS/UDP and RADIUS/TCP - instead RADIUS/TLS or RADIUS/DTLS should be used.

Remedy

TBD

Remedy

The best way to address this issue is by using encrypted and authenticated channels that offer modern cryptographic security guarantees. Configure an alternate authentication mechanism if you are using RADIUS with a CHAP or PAP authentication protocol. PAN-OS provides the following alternate RADIUS authentication mechanisms: PEAP-MSCHAPv2 (default), PEAP with GTC, and EAP-TTLS with PAP. For more information, please see https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-admin/authentication/configure-radius-authentication. In addition, instead of using RADIUS, you can configure an alternate authentication mechanism using one of the options described here: https://docs.paloaltonetworks.com/pan-os/11-1/pan-os-admin/authentication. If you are a Prisma Access customer using a RADIUS configuration with PAP or CHAP in your profile and have not applied one of the changes described above, please reach out to TAC/CS to schedule an upgrade window. PAN-OS 9.1.19, PAN-OS 10.1.14, PAN-OS 10.2.10, PAN-OS 11.0.7, PAN-OS 11.1.3, and all later PAN-OS versions add a new feature to enforce an authentication check in RADIUS. This new feature is disabled by default to match the existing behavior. To enable this feature, run the following commands: > set auth radius-require-msg-authentic yes To confirm that the setting was correctly enabled, run the following command: > show auth radius-require-msg-authentic If set correctly, the response will say "yes". This setting is persistent across reboots. No ‘commit’ is required for this to take effect. Please note that this feature requires that the RADIUS server has been updated to support the new protocol changes, as detailed in https://kb.cert.org/vuls/id/456537. If your RADIUS authentication breaks when radius-require-msg-authentic is set to yes, please work with your RADIUS server vendor for support with the RADIUS server upgrade process.
First published (updated )
Severity
7.2
Command Injection, OS Command Injection
AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:X/RL:O/RC:C

An improper neutralization of special elements used in an OS command ('OS Command Injection') vulnerability [CWE-78] in FortiSandbox GUI may allow an authenticated privileged attacker to execute unauthorized code or commands via crafted HTTP or HTTPS requests.

1 / 2
Source: FortiGuard

Remedy

Upgrade to FortiSandbox version 5.0.3 or above Upgrade to FortiSandbox version 4.4.8 or above Fortinet remediated this issue in FortiSandbox Cloud version 24.2 (not released) and hence customers do not need to perform any action.
First published (updated )
Severity
9.1
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

A missing authorization vulnerability [CWE-862] in FortiSandbox, FortiSandbox Cloud and FortiSandbox PaaS WEB UI may allow an unauthenticated attacker to execute unauthorized code or commands via HTTP requests.

First published (updated )
Advisory
FG-IR-26-136
Severity
5.4
XSS
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] in FortiSandbox and FortiSandbox Cloud may allow an attacker to perform an XSS attack via crafted HTTP requests.

1 / 2
Source: FortiGuard

Remedy

Upgrade to FortiSandbox PaaS version 5.0.5 or above Upgrade to FortiSandbox version 5.0.5 or above
First published (updated )
Severity
6.7
Path Traversal
AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H/E:F/RL:O/RC:C

A improper limitation of a pathname to a restricted directory ('path traversal') 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, FortiSandbox PaaS 5.0.4 may allow a privileged attacker with super-admin profile and CLI access to delete an arbitrary directory via HTTP crafted requests.

1 / 2
Source: MITRE

Remedy

Fortinet remediated this issue in FortiSandbox Cloud version 5.0.5 and hence customers do not need to perform any action. Upgrade to upcoming FortiSandbox version 5.2.0 or above Upgrade to FortiSandbox version 5.0.6 or above Upgrade to FortiSandbox version 4.4.9 or above Upgrade to FortiSandbox PaaS version 5.0.5 or above
First published (updated )
Severity
2.7
AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C

A insufficiently protected credentials vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4 all versions, FortiSandbox PaaS 5.0.1 through 5.0.5 may allow an authenticathed administrator to read LDAP server credentials via client-side inspection.

1 / 2
Source: MITRE

Remedy

Upgrade to upcoming FortiSandbox version 5.2.0 or above Upgrade to FortiSandbox version 5.0.6 or above Upgrade to FortiSandbox PaaS version 5.0.6 or above
First published (updated )
Severity
4.8
XSS
AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C

A improper neutralization of input during web page generation ('cross-site scripting') 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 PaaS 5.0.0 through 5.0.5, FortiSandbox PaaS 4.4.0 through 4.4.8, FortiSandbox PaaS 4.2 all versions may allow attacker to execute unauthorized code or commands via <insert attack vector here>

1 / 2
Source: MITRE

Remedy

Upgrade to FortiSandbox version 5.0.6 or above Upgrade to FortiSandbox version 4.4.9 or above Upgrade to FortiSandbox PaaS version 5.0.6 or above Upgrade to FortiSandbox PaaS version 4.4.9 or above
First published (updated )
Severity
2.5
AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:N/E:P/RL:O/RC:C

An Insufficiently protected credentials vulnerability [CWE-522] in FortiSanbox and FortiSanbox PaaS GUI may allow an authenticated administrator to read LDAP server credentials via client-side inspection.

First published (updated )
Advisory
FG-IR-26-113
Severity
9.1
Command Injection, OS Command Injection
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

An Improper Neutralization of Special Elements used in an OS Command ('OS command injection') vulnerability [CWE-78] in FortiSandbox may allow an unauthenticated attacker to execute unauthorized code or commands via crafted HTTP requests.

First published (updated )
Advisory
FG-IR-26-100
Severity
9.1
Path Traversal
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:O/RC:C

A Path Traversal vulnerability [CWE-24] in FortiSandbox JRPC API may allow an unauthenticated attacker to bypass authentication via specially crafted HTTP requests.

First published (updated )
Advisory
FG-IR-26-112
Severity
6.2
Path Traversal
AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:H/E:F/RL:O/RC:C

An Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') vulnerability [CWE-22] in FortiSandbox, FortiSandbox Cloud, FortiSandbox PaaS and FortiSandbox Cloud WEB UI may allow a privileged attacker with super-admin profile and CLI access to delete an arbitrary directory via HTTP crafted requests.

First published (updated )
Advisory
FG-IR-26-115
Severity
4.3
XSS
AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:P/RL:O/RC:C

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] in FortiSandbox and FortiSandbox Cloud may allow a privileged attacker to perform a stored XSS attack via crafted HTTP requests.

First published (updated )
Advisory
FG-IR-26-110
Severity
4.9
XSS
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N/E:P/RL:O/RC:C

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] in FortiSandbox and FortiSandbox Cloud may allow an attacker to perform an XSS attack via crafted HTTP requests.

First published (updated )
Advisory
FG-IR-26-109
Severity
4.8
XSS
AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:P/RL:X/RC:C

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] in FortiSandbox LDAP Server feature may allow an authenticated privileged attacker to execute code via crafted requests.

1 / 2
Source: FortiGuard

Remedy

Upgrade to FortiSandbox version 5.0.3 or above Upgrade to FortiSandbox version 4.4.8 or above Fortinet remediated this issue in FortiSandbox Cloud version 5.0.5 and hence customers do not need to perform any action.
First published (updated )

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