Read the docs
TI-2026-74715 Aliases CVE-2026-47790

Cross-site scripting in QNAP QuFTP Service log handling

Priority LOW 28CWE-79Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Active
Attack complexity
Low
Attack requirements
None
Impact type
Cross-site scripting
Confidentiality · integrity · availability
Low · None · None
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-79.

Summary

QNAP QuFTP Service versions from 1.4.x before 1.4.6, from 1.5.x before 1.5.5, and from 1.6.x before 1.6.5 are affected. A cross-site scripting flaw (CWE-79) lets malicious code be injected through log entries. A remote attacker who already holds a user account can exploit it to inject malicious code.

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

Description from the CNA

A cross-site scripting (XSS) vulnerability has been reported to affect QuFTP Service. If a remote attacker gains a user account, they can then exploit the vulnerability to inject malicious code. We have already fixed the vulnerability in the following version: QuFTP Service 1.4.6 and later QuFTP Service 1.5.5 and later QuFTP Service 1.6.5 and later

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.0028 20th percentileScored 2026-11-07
Fix Fixed QuFTP Service (QNAP Systems Inc.): 1.4.6, 1.5.5, 1.6.5

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
QNAPQuFTP Service1.4.x to before 1.4.6; 1.5.x to before 1.5.5; 1.6.x to before 1.6.51.4.6, 1.5.5, 1.6.5Patch availableCNA
  • QuFTP Service VendorQNAP Affected 1.4.x to before 1.4.6; 1.5.x to before 1.5.5; 1.6.x to before 1.6.5 Fixed in 1.4.6, 1.5.5, 1.6.5 Patch available CNA

Remediation

Update QuFTP Service to 1.4.6 or later in the 1.4 branch, 1.5.5 or later in the 1.5 branch, or 1.6.5 or later in the 1.6 branch.

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

  • Fix · CNA QuFTP Service (QNAP Systems Inc.) Fixed in 1.4.6, 1.5.5, 1.6.5

Timeline

  1. 2026-10-16 Threatist record created from CVE-2026-47790

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