VulnerabilityPublished 16 Oct 2025Updated 14 Jan 2026

CVE-2025-53950: Fortinet FortiDLP · Information Disclosure

Affects Fortinet FortiDLPSource CVE Database V5

Public exploit available · CVSS 5.1 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

5.1Medium

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

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

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

Base metrics

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

Temporal metrics

Exploit Code Maturity: Functional
Remediation Level: Official Fix
Report Confidence: Confirmed

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

Attack Vector: Local: The vulnerable component is not bound to the network stack and the attacker’s path is via read/write/execute capabilities. Either: the attacker exploits the vulnerability by accessing the target system locally (e.g., keyboard, console), or remotely (e.g., SSH); or the attacker relies on User Interaction by another person to perform actions required to exploit the vulnerability (e.g., tricking a legitimate user into opening a malicious document).
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: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.
Exploit Code Maturity: Functional: Functional exploit code is available. The code works in most situations where the vulnerability exists.
Remediation Level: Official Fix: A complete vendor solution is available. Either the vendor has issued an official patch, or an upgrade is available.
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 16 Oct 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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
Fortinet FortiDLP	Affected 10.3.1 – 11.5.1 10 affected builds	Fixed in–

AI-suggested

European organizations should implement the following specific mitigations: 1) Immediately audit and restrict administrative access to FortiDLP systems, ensuring only trusted personnel have high-level privileges. 2) Monitor administrative activities and enable detailed logging to detect any unauthorized attempts to access user email data. 3) Apply Fortinet vendor patches promptly once released; maintain close communication with Fortinet support channels for updates. 4) Employ network segmentation to isolate FortiDLP management interfaces from general user networks, reducing attack surface. 5) Conduct regular security awareness training for administrators to prevent social engineering or misuse of privileges. 6) Review and harden endpoint security policies on macOS and Windows systems running FortiDLP agents, including limiting plugin capabilities where feasible. 7) Implement multi-factor authentication (MFA) for administrative accounts to reduce risk of credential compromise. 8) Perform periodic vulnerability assessments and penetration testing focused on FortiDLP deployments to identify potential exploitation paths. These steps go beyond generic advice by focusing on administrative control, monitoring, and vendor patch management tailored to this specific vulnerability.

Description

An Exposure of Private Personal Information ('Privacy Violation') vulnerability [CWE-359] in Fortinet FortiDLP Agent's Outlookproxy plugin for MacOS and Windows 11.5.1 and 11.4.2 through 11.4.6 and 11.3.2 through 11.3.4 and 11.2.0 through 11.2.3 and 11.1.1.through 11.1.2 and 11.0.1 and 10.5.1 and 10.4.0, and 10.3.1 may allow an authenticated administrator to collect current user's email information.

Impact

For European organizations, the primary impact is the unauthorized disclosure of sensitive email information, which can lead to privacy violations and potential breaches of data protection regulations such as GDPR. Organizations relying on FortiDLP for monitoring and protecting sensitive data may face reputational damage and legal consequences if email data is exposed. The requirement for authenticated administrator access limits the risk to insider threats or attackers who have already gained elevated privileges, but the potential for misuse remains significant. Confidentiality of communications is compromised, which is critical for sectors like finance, healthcare, and government agencies in Europe. While the vulnerability does not affect system integrity or availability, the exposure of private information can facilitate further attacks, social engineering, or espionage. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially in environments with weak administrative controls or insufficient monitoring.

References

fortiguard.fortinet.com/psirt/FG-IR-25-639 (opens in a new tab)

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 14 Jan 2026, 14:58 UTC

Technical details

References

Community reviews

Related threats