What’s Vulnerable › Vulnerabilities
CVE-2025-13833: Insecure TLS Fingerprint Validation in ForeScout SecureConnector Configuration Enables Remote Code Execution
- Severity: high (CVSS 7.7 v4.0)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-26 · updated 2026-10-28
- Weakness: CWE-295
Description
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.
Affected products
- Forescout Technologies SecureConnector: before 11.3.20 — fixed in 11.3.20
How to fix
Upgrade to a fixed version: Forescout Technologies SecureConnector 11.3.20. Check the vendor advisory for mitigations.
References
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