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TI-2026-74705 Aliases CVE-2026-34009

QNAP Notes Station 3 improper isolation lets local admins compromise system

Priority LOW 37CWE-653Published · Updated

Key facts

Attack vector
Local
Privileges required
High
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

QNAP Notes Station 3 versions from 3.9.x before 3.9.11 contain an improper isolation or compartmentalization flaw (CWE-653). A local attacker who already holds an administrator account can use it to compromise the security of the system.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

An improper isolation or compartmentalization vulnerability has been reported to affect Notes Station 3. If a local attacker gains an administrator account, they can then exploit the vulnerability to compromise the security of the system. We have already fixed the vulnerability in the following version: Notes Station 3 3.9.11 and later

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00111 1st percentileScored 2026-11-07
Fix Fixed Notes Station 3 (QNAP Systems Inc.): 3.9.11

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
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
QNAPNotes Station 33.9.x to before 3.9.113.9.11Patch availableCNA
  • Notes Station 3 VendorQNAP Affected 3.9.x to before 3.9.11 Fixed in 3.9.11 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPEVersionsRoleVendor
cpe:2.3:a:qnap:notes_station_3:*:*:*:*:*:*:*:*——QNAP
  • cpe:2.3:a:qnap:notes_station_3:*:*:*:*:*:*:*:* Versions — — ·QNAP

Remediation

QNAP Notes Station 3 3.9.11 and later fix this vulnerability. Update Notes Station 3 to version 3.9.11 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

  • Fix · CNA Notes Station 3 (QNAP Systems Inc.) Fixed in 3.9.11

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    QNAP Systems Notes Station 3 3.9.11

    3 records Highest priority Priority LOW 3 LOW

    Other records, highest priority first

    • TI-2026-74703 OS command injection in QNAP Notes Station 3Priority LOW 39
    • TI-2026-74704 Incorrect permissions in QNAP Notes Station 3 allow privilege escalationPriority LOW 37
    Show all 3 records →

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-34009

References

Other 1

  • TI-2022-10581 DeadBolt Ransomware KEVCVSS 3.1CRITICAL 10.0
  • TI-2021-09791 Improper Authorization Vulnerability in HBS 3 (Hybrid Backup Sync) KEVCVSS 3.1CRITICAL 10.0
  • TI-2020-02221 Command Injection Vulnerability in QTS and QuTS hero KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05103 Path traversal in QNAP NAS devices running Photo Station KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05102 Path traversal in QNAP NAS devices running Photo Station KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05101 Improper input validation in QNAP NAS devices KEVCVSS 3.1CRITICAL 9.8
See all 681 →

Sources

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