Forescout SecureConnector up to 11.3.20 certificate validation

Summaryinfo

A vulnerability was found in Forescout SecureConnector up to 11.3.20. It has been classified as problematic. Affected by this vulnerability is an unknown functionality. The manipulation leads to certificate validation. This vulnerability is uniquely identified as CVE-2025-13833. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Forescout SecureConnector up to 11.3.20 and classified as problematic. This issue affects an unknown code block. The manipulation with an unknown input leads to a certificate validation vulnerability. Using CWE to declare the problem leads to CWE-295. The product does not validate, or incorrectly validates, a certificate. Impacted is integrity. The summary by CVE is:

A vulnerability exists in SecureConnector for Windows when the “Additional Appliance Connections” setting is enabled and the agent’s configuration file contains more than three trusted‑server entries. Some entries omit TLS certificate fingerprints, which allows the agent to accept and establish sessions with a malicious server. An attacker who controls the wired or wireless network can redirect traffic to a malicious server. The attacker can then use the agent’s built‑in command/file features to execute arbitrary commands as SYSTEM, granting full administrative control and the ability to disable endpoint protections or exfiltrate data.

It is possible to read the advisory at support.forescout.com. The identification of this vulnerability is CVE-2025-13833 since 12/01/2025. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/26/2026). The attack technique deployed by this issue is T1587.003 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

• Forescout

Name

• SecureConnector

Version

• 11.3.0
• 11.3.1
• 11.3.2
• 11.3.3
• 11.3.4
• 11.3.5
• 11.3.6
• 11.3.7
• 11.3.8
• 11.3.9
• 11.3.10
• 11.3.11
• 11.3.12
• 11.3.13
• 11.3.14
• 11.3.15
• 11.3.16
• 11.3.17
• 11.3.18
• 11.3.19
• 11.3.20

CPE 2.3info

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CPE 2.2info

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Entryinfo

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