VulnRadar

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Page generated: 09 Nov 2026, 09:51 UTC

CVE-2020-2509

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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

CVSS 9.8 (CRITICAL) KEV: KNOWN CATALOG

Attention and evidence

HYPE SCORE

0.0/10

REALITY · THREAT PRIORITY

8.6/10

General review priority; not probability

Evidence confidence: Exploitation recorded

Why this priority?

Recorded exploitation baseline: +7.00
Technical severity: CVSS 9.8: +1.47
Fresh EPSS: 33.99%: +0.17

General review priority, not probability, victim count or asset-specific risk. A range covers missing CVSS/EPSS inputs within the current evidence state.

Sources: 4 documents and public datasets.

Hype components

Headline sample (25%)

0/100

Press, 30 days (60%)

0/100

Grounded branding (15%)

0/100

HYPE TOTAL0/100

Sources and documents

Rapid7

Press · 04 Aug 2022, 07:00 · QNAP Poisoned XML Command Injection (Silently Patched) - Rapid7

Help Net Security

Press · 26 Apr 2021, 07:00 · QNAP NAS devices under ransomware attack - Help Net Security

BleepingComputer

Press · 22 Apr 2021, 07:00 · QNAP removes backdoor account in NAS backup, disaster recovery app - BleepingComputer

The Register

Press · 02 Apr 2021, 07:00 · QNAP caught napping as disclosure delay expires, critical NAS bugs revealed - The Register

Score evolution

● Hype ● Reality

Earlier evidence-support scores are retained in history; this chart shows only the current priority definition.

First record: hype 0.0 · reality 8.6 (2026-11-02 15:12). The curve appears once the score changes.

Public exploit evidence

Public exploit entries / repo candidates

See 1 repos with metrics

Repository	Stars	Forks	Language	Updated
jbaines-r7/overkill	14	10	Python	27 Jul 2022, 20:53

Evidence context and dated references

Reality is general threat/review priority, combining observed exploitation, CVSS severity and fresh EPSS. Evidence confidence is separate. This is not calibrated risk, a victim count or an asset-specific assessment. A range reflects missing numeric inputs.

Evidence in context

Confidence in exploitation evidence: Exploitation recorded
Priority basis: Recorded exploitation; CVSS 9.8; EPSS 34.0%
Attention, last 30 days: 0 distinct story titles; 0 press documents; 0 publisher domains.
Technical potential: network access, no prior privileges, no user interaction.
Observed activity: Exploitation recorded in CISA KEV.
Known scale: Not quantified.
Evidence confidence basis: Trusted exploitation confirmation

Score evaluated: 2026-11-05 13:58:16.425062+00:00 · EPSS snapshot: 2026-11-05T12:03:04Z

Source event timeline

First press mention

02 Apr 2021, 07:00

Published

17 Apr 2021, 03:50

Added to the CISA KEV catalog

11 Apr 2022, 00:00

Latest press mention

04 Aug 2022, 07:00

Score calculated

05 Nov 2026, 13:58

PoCs on GitHub

1 repositories