Which products and versions are affected by CVE-2020-2506?

Affected: Helpdesk (Qnap) versions >= unspecified. The full list is in the CVE brief.

Is CVE-2020-2506 being exploited in the wild?

It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 5, 2021.

Is CVE-2020-2506 in the CISA KEV catalog?

Yes. It was added on Mar 25, 2022 with a federal remediation due date of Apr 15, 2022.

Is there a public exploit for CVE-2020-2506?

Public exploit code is available.

Is there a fix for CVE-2020-2506?

Fixed versions are available, including Helpdesk 3.0.3.

How urgently should CVE-2020-2506 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2020-2506

CriticalExploitedPublic exploit

The vulnerability have been reported to affect earlier versions of QTS.

Published Feb 3, 2021 · Updated Oct 27, 2025

Key Facts

Patch immediately

CVE-2020-2506 is a critical-severity vulnerability (CVSS 9.8 v3.1) affecting Helpdesk (Qnap).
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 5, 2021. Public exploit code is available.
EPSS estimates a 2.0% probability of exploitation in the next 30 days.
Fixed versions are available, including Helpdesk 3.0.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v3.1

9.8

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS (30-day exploit likelihood)

2.0%

Higher than 80.2% of all scored CVEs

Exploited in the wild

Yes

4 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2020-2506 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
CISA KEV	Mar 25, 2022	Apr 15, 2022	Not reported
Industry KEV feed	Mar 5, 2021	Apr 15, 2022	Not reported
CIRCL KEV	Mar 25, 2022	Apr 15, 2022	Not reported
ENISA EUVD	Mar 25, 2022	n/a	Not reported

Required action: Apply updates per vendor instructions.

Affected Products

2 affected entries in total

Product	Affected versions	Fixed in
HelpdeskQnap	>= unspecified	3.0.3

Patched Releases

Helpdesk

3.0.3

Timeline

Publicly disclosed
Feb 3, 2021
Added to Industry KEV feed
Mar 5, 2021
Added to CISA KEV
Mar 25, 2022
Added to CIRCL KEV
Mar 25, 2022
Added to ENISA EUVD
Mar 25, 2022
Last updated
Oct 27, 2025

Weakness Type

CWE-284 Improper Access Control

References

FAQ

Common Questions.

The vulnerability have been reported to affect earlier versions of QTS.
Affected: Helpdesk (Qnap) versions >= unspecified. The full list is in the CVE brief.
It is exploited in the wild, listed in CISA KEV, Industry KEV feed, CIRCL KEV, ENISA EUVD since Mar 5, 2021.
Yes. It was added on Mar 25, 2022 with a federal remediation due date of Apr 15, 2022.
Public exploit code is available.
Fixed versions are available, including Helpdesk 3.0.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

Is CVE-2020-2506 Running On Your Attack Surface?

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