CVE-2021-28805: Inclusion of Sensitive Information in QSS

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-06-11 · updated 2026-06-17
Weakness: CWE-540

Description

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 Systems Inc. QSS: before 1.0.3; before 1.0.12 — fixed in 1.0.12, 1.0.3

How to fix

Upgrade to a fixed version: QNAP Systems Inc. QSS 1.0.12, 1.0.3. Check the vendor advisory for mitigations.

References

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