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CVE-2021-28813: Insufficiently Protected Credentials Vulnerability in QSW-M2116P-2T2S and QuNetSwitch

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-10 · updated 2026-06-17
• Weakness: CWE-259

Description

A vulnerability involving insecure storage of sensitive information has been reported to affect QSW-M2116P-2T2S and QNAP switches running QuNetSwitch. If exploited, this vulnerability allows remote attackers to read sensitive information by accessing the unrestricted storage mechanism.We have already fixed this vulnerability in the following versions: QSW-M2116P-2T2S 1.0.6 build 210713 and later QGD-1600P: QuNetSwitch 1.0.6.1509 and later QGD-1602P: QuNetSwitch 1.0.6.1509 and later QGD-3014PT: QuNetSwitch 1.0.6.1519 and later

Affected products

• QNAP Qsw-M2116P-2T2S Firmware: before 1.0.6 — fixed in 1.0.6
• QNAP Systems Inc. QuNetSwitch: before 1.0.6.1509 — fixed in 1.0.6.1509

How to fix

Upgrade to a fixed version: QNAP Qsw-M2116P-2T2S Firmware 1.0.6; QNAP Systems Inc. QuNetSwitch 1.0.6.1509. Check the vendor advisory for mitigations.

References

• https://www.qnap.com/en/security-advisory/qsa-21-37
• https://www.qnap.com/en/security-advisory/qsa-21-37

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