High · CVSS 7.7CVE-2025-13833

Insecure TLS Fingerprint Validation in ForeScout SecureConnector Configuration Enables Remote Code ExecutionCVE-2025-13833

Answer in brief

CVE-2025-13833 records a High severity (CVSS 7.7) vulnerability in Insecure TLS Fingerprint Validation in ForeScout SecureConnector Configuration Enables Remote Code Execution. The current sources do not mark it as known exploited. The current feed maps Forescout Technologies/SecureConnector (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 26, 2026Updated Oct 26, 2026Source checked Oct 26, 2026First seen by HOL Oct 26, 2026Material review Oct 26, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.7
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Not reported

Why this deserves its current priority

CVSS is 7.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Forescout Technologies/SecureConnector (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Forescout Technologies/SecureConnectorgeneric	>=0 <=11.3.20	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Forescout Technologies/SecureConnector.
Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

Published upstream
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Oct 26, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Oct 26, 2026

Sources and claim methodology

Source referencesupport.forescout.com

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.