Evidence dossier

CVE-2020-2509

Command Injection Vulnerability in QTS and QuTS hero

70.2–91.0Priority evidence range

As known Jul 19, 2026, 5:00 AM UTCgen-56ccdaf9

Normalized restatement

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

State: PUBLISHED
Published: Apr 17, 2021
Updated: Oct 21, 2025
Evidence coverage: 72%

CISA KEVCatalog member

Apply updates per vendor instructions.

FIRST EPSS32.80%

2026-07-18 · v2026.06.15 · percentile 98.2%

Source stateConflict visible

Distinct CVSS assessments remain side by side; none are averaged.

Source comparison

Who said what

CISA-ADPindependent enrichment

container

CISA ADP Vulnrichment

Jul 19, 2026Original evidence ↗

CVEderivative copy

container

CVE Program Container

Jul 19, 2026Original evidence ↗

qnaporiginal assertion

container

Command Injection Vulnerability in QTS and QuTS hero

Jul 19, 2026Original evidence ↗

CISA KEVoriginal assertion

observed_exploitation

QNAP Network-Attached Storage (NAS) Command Injection Vulnerability

Jul 19, 2026Original evidence ↗

FIRST EPSSoriginal assertion

model_probability

Probability 0.328000000000; percentile 0.981640000000

Jul 19, 2026Original evidence ↗

Applicability

Cited product scope

Trace impact →

QNAP Systems Inc.QTS

[{"status": "affected", "version": "unspecified", "lessThan": "4.5.2.1566 Build 20210202", "versionType": "custom"}, {"status": "affected", "version": "unspecified", "lessThan": "4.5.1.1495 Build 20201123", "versionType": "custom"}, {"status": "affected", "version": "unspecified", "lessThan": "4.3.6.1620 Build 20210322", "versionType": "custom"}, {"status": "affected", "version": "unspecified", "lessThan": "4.3.4.1632 Build 20210324", "versionType": "custom"}, {"status": "affected", "version": "unspecified", "lessThan": "4.3.3.1624 Build 20210416", "versionType": "custom"}, {"status": "affected", "version": "unspecified", "lessThan": "4.2.6 Build 20210327", "versionType": "custom"}]

unknown

QNAP Systems Inc.QuTS hero

[{"status": "affected", "version": "unspecified", "lessThan": "h4.5.1.1491 build 20201119", "versionType": "custom"}]unknown

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*; end excluding 4.2.6supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*; start including 4.3.5; end excluding 4.3.6supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:*:*:*:*:*:*:*:*; start including 4.4.0; end excluding 4.5.1supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.2.6:-:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.2.6:build_20170517:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.2.6:build_20190322:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.2.6:build_20190730:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.2.6:build_20190921:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.2.6:build_20191107:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.2.6:build_20200109:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.2.6:build_20200421:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.2.6:build_20200611:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.2.6:build_20200821:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.3.0174:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.3.0868:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.3.0998:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.3.1051:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.3.1098:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.3.1161:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.3.1252:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.3.1315:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.3.1386:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.3.1432:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0358:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0358:beta1:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0370:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0370:beta1:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0372:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0372:beta1:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0374:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0374:beta1:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0387:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0387:beta2:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0411:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0416:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0427:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0434:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0435:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0451:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0483:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0486:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0506:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0516:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0526:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0551:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0557:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0561:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0569:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0593:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0597:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0604:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.0899:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.1029:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.1082:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.1190:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.1282:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.1368:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.1417:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.4.1463:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6:-:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.0895:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.0907:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.0923:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.0944:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.0959:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.0979:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.0993:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.1013:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.1033:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.1070:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.1154:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.1218:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.1263:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.1286:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.1333:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.1411:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.3.6.1446:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.5.1:-:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.5.1.1456:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.5.1.1461:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.5.1.1465:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.5.1.1480:*:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:qts:4.5.2:-:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:quts_hero:*:*:*:*:*:*:*:*; end excluding h4.5.1supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:quts_hero:h4.5.1:-:*:*:*:*:*:*supported

Unknown vendorUnknown product

cpe:2.3:o:qnap:quts_hero:h4.5.1.1472:*:*:*:*:*:*:*supported

Assessments

CVSS by origin

9.8

nvd@nist.govCVSS 3.1 · role PrimaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

7.5

nvd@nist.govCVSS 2.0 · role PrimaryAV:N/AC:L/Au:N/C:P/I:P/A:P

9.8

134c704f-9b21-4f2e-91b3-4a467353bcc0CVSS 3.1 · role SecondaryCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

9.8

CISA-ADPCVSS 3.1 · role unknownCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Limitations and unknowns

KEV membership is authoritative for the catalog, not proof of exposure in any environment.
EPSS is a dated model probability and not an individual-environment prediction.
Affected or fixed status applies only to the exact cited product and version scope; unresolved scope remains unknown.
NVD-carried upstream facts remain derivative and are not independent corroboration.
Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
Factor D is unknown in Public Core because no accepted canonical mapping-obligation ledger is present.
Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.