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

Yes. CVE-2020-2506 is on the CISA Known Exploited Vulnerabilities list, added 2022-03-25.

What is the CVSS severity of CVE-2020-2506?

CVE-2020-2506 has a CVSS v3 base score of 7.3 (HIGH).

What is the EPSS score for CVE-2020-2506?

CVE-2020-2506 has an EPSS score of 1.98% (78th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2020-2506

HIGHCISA KEVEPSS 78th pctl

7.3

CVSS v3

NVD

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.

CWE-284Improper Access Control

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

1.98%probability of exploitation in 30 days

78thpercentile

Elevated risk: more likely to be exploited than 78% of all known CVEs.

Known Exploited Vulnerability (CISA KEV)

QNAP Helpdesk Improper Access Control Vulnerability

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

Apply updates per vendor instructions.

Remediation due: 2022-04-15

References

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-10-27.