CVE-2020-2506: QNAP Helpdesk Improper Access Control Vulnerability

Severity: critical (CVSS 9.8 v3.1)
Exploited in the wild: yes — in CISA KEV since 2022-03-25
EPSS: 2.0% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-02-03 · updated 2026-06-17
Weakness: CWE-284

Description

The vulnerability have been reported to affect earlier versions of QTS. If exploited, this improper access control vulnerability could allow attackers to compromise the security of the software by gaining privileges, or reading sensitive information. This issue affects: QNAP Systems Inc. Helpdesk versions prior to 3.0.3.

Affected products

QNAP Systems Inc. Helpdesk: before 3.0.3 — fixed in 3.0.3

How to fix

Upgrade to a fixed version: QNAP Systems Inc. Helpdesk 3.0.3. Check the vendor advisory for mitigations.

References

https://www.qnap.com/zh-tw/security-advisory/qsa-20-08
https://www.qnap.com/zh-tw/security-advisory/qsa-20-08
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-2506

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