# CVE-2020-2506: improper access control vulnerability in Helpdesk > CVE-2020-2506: improper access control vulnerability in Helpdesk. CVSS 7.3 (CVSS 3.1), in CISA KEV. Canonical: https://rewindex.com/cve/CVE-2020-2506 Last updated: 2025-10-21T23:35:29Z - Published: 2021-02-03 15:51 UTC · Updated: 2025-10-21 23:35 UTC · Assigner: qnap - CVSS: 7.3 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - EPSS: 2.0%, 80th percentile (scored 2026-10-25) - CISA KEV: yes, added 2022-03-25, federal due date 2022-04-15, ransomware use: Unknown - CWE: 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. ## CISA required action Apply updates per vendor instructions. ## Affected vendors and products - QNAP Systems Inc.: Helpdesk ## References - [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2020-2506) - [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2020-2506) - [https://www.qnap.com/zh-tw/security-advisory/qsa-20-08](https://www.qnap.com/zh-tw/security-advisory/qsa-20-08) --- _Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_ --- Canonical: https://rewindex.com/cve/CVE-2020-2506 · Markdown: https://rewindex.com/cve/CVE-2020-2506.md · JSON: https://rewindex.com/api/v1/cves/CVE-2020-2506 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:11:14.799Z