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TI-2026-80441 Aliases CVE-2026-106781GHSA-vcm3-cv68-2c35

Privilege escalation in WCH CH340/CH341 USB-to-Serial Windows driver

Priority HIGH 69CWE-269Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Privilege escalation
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-269.

Summary

The CH341SER.EXE setup package in WCH CH340/CH341 USB-to-Serial Windows Driver version 4.0 has improper privilege management (CWE-269). A local attacker with low privileges can escalate privileges, with high impact to confidentiality, integrity and availability.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Description from the CNA

An issue in WCH CH340/CH341 USB-to-Serial Windows Driver setup package CH341SER.EXE version 4.0 allows a local attacker to escalate privileges.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00151 4th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

Remediation

No fixed version is listed for WCH CH340/CH341 USB-to-Serial Windows Driver.

Written with Claude Haiku 5.5 from the sources below · 2026-10-30

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-106781
  2. 2026-10-27 Alias added: GHSA-vcm3-cv68-2c35
  3. 2026-10-30 CVSS score added · CISA ADP
  4. 2026-10-30 Weakness changed · CISA ADP
  5. 2026-10-30 CISA SSVC decision points changed
  6. 2026-10-30 Priority changed: LOW → HIGH

References

Other 2

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences