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Vulnerability · Published Oct 15, 2026 · Assigned by qnap

CVE-2026-47790Privilege Escalation via QuFTP Log-based XSS

Medium 6.3

In plain English

A medium-severity cross-site scripting in QuFTP Service from QNAP Systems Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).

Severity (CVSS 4.0)6.3Medium
Exploit odds (30 days)0.3%top 79.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

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

Affected products (as reported)

VendorProductVersions
QNAP Systems Inc. QuFTP Service 1.4.x – before 1.4.61.5.x – before 1.5.51.6.x – before 1.6.5

Weakness: CWE-79 · 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

References