CVE-2020-2509

CVE-2020-2509 is a critical-severity vulnerability in Qnap Qts with a CVSS 3.x base score of 9.8. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-04-11). The underlying weakness is classified as CWE-77.

Key facts

Description

A command injection vulnerability has been reported to affect QTS and QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary commands in a compromised application. We have already fixed this vulnerability in the following versions: QTS 4.5.2.1566 Build 20210202 and later QTS 4.5.1.1495 Build 20201123 and later QTS 4.3.6.1620 Build 20210322 and later QTS 4.3.4.1632 Build 20210324 and later QTS 4.3.3.1624 Build 20210416 and later QTS 4.2.6 Build 20210327 and later QuTS hero h4.5.1.1491 build 20201119 and later

Frequently asked questions

What is CVE-2020-2509?
A command injection vulnerability has been reported to affect QTS and QuTS hero. If exploited, this vulnerability allows attackers to execute arbitrary commands in a compromised application. We have already fixed this vulnerability in the following versions: QTS 4.5.2.1566 Build 20210202 and later QTS 4.5.1.1495 Build 20201123 and later QTS 4.3.6.1620 Build 20210322 and later QTS 4.3.4.1632 Build 20210324 and later QTS 4.3.3.1624 Build 20210416 and later QTS 4.2.6 Build 20210327 and later QuTS hero h4.5.1.1491 build 20201119 and later
How severe is CVE-2020-2509?
CVE-2020-2509 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-2509 being actively exploited?
Yes. CVE-2020-2509 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-04-11, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2020-2509?
CVE-2020-2509 primarily affects Qnap Qts. In total, 84 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-2509?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2020-2509 have an EU (EUVD) identifier?
Yes. CVE-2020-2509 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2020-22302. It is also flagged as exploited in the EUVD (since 2022-04-11).
When was CVE-2020-2509 published?
CVE-2020-2509 was published on 2021-04-17 and last updated on 2026-06-17.

References

Affected products (84)

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