CVE-2021-28805: QNAP Qss

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

Inclusion of sensitive information in the source code has been reported to affect certain QNAP switches running QSS. If exploited, this vulnerability allows attackers to read application data. This issue affects: QNAP Systems Inc. QSS versions prior to 1.0.3 build 20210505 on QSW-M2108-2C; versions prior to 1.0.3 build 20210505 on QSW-M2108-2S; versions prior to 1.0.3 build 20210505 on QSW-M2108R-2C; versions prior to 1.0.12 build 20210506 on QSW-M408.

Affected products

• QNAP Qss: before 1.0.3 (fixed in 1.0.3); before 1.0.12 (fixed in 1.0.12)

Published 2021-06-11. Last modified 2026-06-17.