QNAP Helpdesk Improper Access Control Vulnerability

Are you affected?

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• cpe qnap/helpdeskversion unspecified
• vendor QNAP Helpdeskversion unspecified
• vendor QNAP Systems Helpdeskversion unspecified

How to fix CVE-2020-2506

• Recommended remediation

  Apply updates per vendor instructions. CISA due date Apr 15, 2022.

• Official advisories

  • CISA KEV · cisa.gov
  • CVE.org · cve.org
  • FIRST EPSS · first.org
  • NIST NVD · nvd.nist.gov
  • VulnCheck KEV · vulncheck.com

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Feb 3, 2021 · Catalog

   Detected

   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.

2. Mar 25, 2022 · CISA KEV

   Known exploited

   Apply updates per vendor instructions.

3. Apr 15, 2022 · CISA KEV

   Remediation due

   Apply updates per vendor instructions.

4. Jun 16, 2026 · Catalog

   Updated

   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.

Sources

• CISA KEVConfirmed exploitationCVE-2020-2506

  QNAP Helpdesk contains an improper access control vulnerability which could allow an attacker to gain privileges or to read sensitive information.

  cisa.gov
• CVE.orgVulnerability recordCVE-2020-2506

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2020-2506

  30-day exploitation probability 2.0%

  first.org
• NIST NVDVulnerability recordCVE-2020-2506

  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 Syst

  nvd.nist.gov
• VulnCheck KEVConfirmed exploitationCVE-2020-2506

  QNAP Helpdesk contains an improper access control vulnerability which could allow an attacker to gain privileges or to read sensitive information.

  vulncheck.com

References

• VulnCheck exploitation evidence · blog.netlab.360.com
• CISA note · nvd.nist.gov
• US Government Resource · cisa.gov
• VulnCheck exploitation evidence · cisa.gov
• Vendor Advisory · qnap.com

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.