CVE-2021-28805
If exploited, this vulnerability allows attackers to read application data.
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.24% probability · 15th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-540, CWE-200
- Affected
- qnap/qss
- Source
- security@qnapsecurity.com.tw
EPSS 0.2% since 26 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://www.qnap.com/zh-tw/security-advisory/qsa-21-24Vendor Advisory
- https://www.qnap.com/zh-tw/security-advisory/qsa-21-24Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.