Medium severity · published Oct 15, 2026
CVE-2026-47790
Privilege Escalation via QuFTP Log-based XSS
6.3
CVSS
0.3%
EPSS
No
On KEV
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
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 20% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QS
QuFTP Service · QNAP Systems Inc.
1.4.x before 1.4.6; 1.5.x before 1.5.5; 1.6.x before 1.6.5 · source: vendor