# CVE-2026-18667 — Tenable, Inc. Sensor Proxy

> As of 2026-08-04, CVE-2026-18667 is a CRITICAL-severity vulnerability in Tenable, Inc. Sensor Proxy, CVSS v3.1 9.6, EPSS 0.3% (29.1th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-18667 as of 2026-08-04; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-08-04

## What is CVE-2026-18667?

A vulnerability in Tenable Sensor Proxy allows a remote attacker to execute code with elevated privileges by inducing an operator to connect the sensor to an attacker-controlled host.

The record classifies CVE-2026-18667 under weakness class [CWE-94](https://intel.threadlinqs.com/cwe/CWE-94). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first, and has high impact on confidentiality, integrity, availability. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 63 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 9.6 — CRITICAL (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H`)
- **CVSS v4.0 base score:** 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 29.1% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-08-03, last modified 2026-08-04

## Is CVE-2026-18667 being exploited?

It currently carries a trending score of 37 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **Tenable, Inc.**: Sensor Proxy

## How to fix CVE-2026-18667

No vendor patch reference has been recorded for CVE-2026-18667 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-18667

No threat campaign in the Threadlinqs corpus currently references CVE-2026-18667, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, GitHub Security Advisories, NVD, FIRST EPSS. Last verified by Threadlinqs on 2026-08-04. This product uses the NVD API but is not endorsed or certified by the NVD.

**Other references**

- [tenable.com](https://www.tenable.com/security/tns-2026-21)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-18667
Full detection coverage and IOCs for threats exploiting CVE-2026-18667 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp