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01 Record

CVE-2026-47790

Privilege Escalation via QuFTP Log-based XSS

MediumPUBLISHEDCNA: qnap
CNA base score6.3 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H

02 Description

Privilege Escalation via QuFTP Log-based XSS

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.28% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 20.3% of scored records. A rank, not a probability.
NVD base score
6.3 (CVSS v4.0), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD analysis status
Awaiting Analysis. NVD last modified this record on 2026-10-15.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2026-10-15 09:38Z13 DAYS AGO
Last updated
2026-10-19 08:06Z10 DAYS AGO
Reserved
2026-05-20
Assigning CNA
qnap
Record state
PUBLISHED
Severity
Medium (CVSS 6.3)
CNA CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/VA:N/SC:H/SI:H/SA:H
Weaknesses
  • CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')Base
Data version
5.2
Document digest
b285026d8e69b96107850d0516f946754736e08f93833f097488446a75418ed8

05 Affected products

VendorProductVersionsPlatforms
QNAP Systems Inc.QuFTP Service1.4.x to < 1.4.6, 1.5.x to < 1.5.5, 1.6.x to < 1.6.5—

06 References

07 Remediation

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