VulnerabilityPublished 10 Mar 2026Updated 12 Mar 2026

CVE-2025-53608: Fortinet FortiSandbox · Execute Unauthorized Code or Commands

Affects Fortinet FortiSandboxSource CVE Database V5

Compare

Public exploit available · CVSS 4.6 Medium.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score

4.6Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.3% chance of exploitation in 30 days – higher than 24% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N/E:P/RL:X/RC:C

Base metrics

Attack Vector: Network
Attack Complexity: Low
Privileges Required: High
User Interaction: Required
Scope: Changed
Confidentiality: Low
Integrity: Low
Availability: None

Temporal metrics

Exploit Code Maturity: Proof-of-Concept
Report Confidence: Confirmed

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: High: The attacker is authorized with (i.e., requires) privileges that provide significant (e.g., administrative) control over the vulnerable component that could affect component-wide settings and files.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Changed: An exploited vulnerability can affect resources beyond the security scope managed by the security authority of the vulnerable component. In this case, the vulnerable component and the impacted component are different and managed by different security authorities.
Confidentiality: Low: There is some loss of confidentiality. Access to some restricted information is obtained, but the attacker does not have control over what information is obtained, or the amount or kind of loss is limited. The information disclosure does not cause a direct, serious loss to the impacted component.
Integrity: Low: Modification of data is possible, but the attacker does not have control over the consequence of a modification, or the amount of modification is limited. The data modification does not have a direct, serious impact on the impacted component.
Availability: None: There is no impact to availability within the impacted component.
Exploit Code Maturity: Proof-of-Concept: Proof-of-concept exploit code is available, or an attack demonstration is not practical for most systems. The code or technique is not functional in all situations and may require substantial modification by a skilled attacker.
Report Confidence: Confirmed: Detailed reports exist, or functional reproduction is possible (functional exploits may provide this). Source code is available to independently verify the assertions of the research, or the author or vendor of the affected code has confirmed the presence of the vulnerability.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 10 Mar 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: evidence found.
CVSS exploit maturity: proof of concept public
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), CVSS vector, the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
FortinetFortiSandbox	Affected >=5.0.0 <=5.0.2 >=4.4.0 <=4.4.7 >=4.2.1 <=4.2.8 >=4.0.0 <=4.0.6	Fixed in–

CPE configurations (26)

cpe:2.3:a:fortinet:fortisandbox:5.0.2:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisandbox:5.0.1:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisandbox:5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisandbox:4.4.7:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisandbox:4.4.6:*:*:*:*:*:*:*
cpe:2.3:a:fortinet:fortisandbox:4.4.5:*:*:*:*:*:*:*

AI-suggested

Restrict administrative access to the FortiSandbox management interface to trusted personnel only, using network segmentation and strong authentication mechanisms such as multi-factor authentication (MFA).
Monitor administrative activities and web interface access logs for unusual or suspicious behavior indicative of attempted exploitation.
Implement strict input validation and web application firewall (WAF) rules where possible to detect and block malicious payloads targeting the FortiSandbox interface.
Until official patches are released by Fortinet, consider disabling or limiting web interface functionality that processes user input or crafted requests.
Educate administrators on the risks of interacting with untrusted links or content within the FortiSandbox management environment to reduce the chance of user interaction exploitation.
Plan and prioritize timely deployment of security updates from Fortinet once available to remediate the vulnerability fully.
Conduct regular security assessments and penetration testing focused on FortiSandbox to identify any residual or related vulnerabilities.

Description

An Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability [CWE-79] vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.2, FortiSandbox 4.4.0 through 4.4.7, FortiSandbox 4.2 all versions, FortiSandbox 4.0 all versions may allow an authenticated privileged attacker to execute code via crafted requests.

Impact

The primary impact of CVE-2025-53608 is unauthorized code execution within the FortiSandbox environment by an authenticated privileged attacker. This can lead to confidentiality breaches if sensitive data processed or stored in the sandbox is exposed or manipulated. Integrity of sandbox analysis results may be compromised, potentially undermining threat detection capabilities and leading to false negatives or false positives. Although availability is not directly impacted, the trustworthiness of the sandbox environment is degraded, which can have downstream effects on overall security posture. Organizations using affected FortiSandbox versions in critical infrastructure, financial services, government, or large enterprises may face increased risk of targeted attacks exploiting this vulnerability. The requirement for high privileges and user interaction limits the ease of exploitation but does not eliminate risk, especially in environments with multiple administrators or where phishing/social engineering could be used to trigger the exploit.

References

fortiguard.fortinet.com/psirt/FG-IR-26-091 (opens in a new tab)

Community reviews

Loading reviews…