If exploited, this command injection vulnerability could allow remote attackers to run arbitrary commands.
If exploited, this command injection vulnerability could allow remote attackers to run arbitrary commands. QNAP has already fixed the issue in the following QTS versions. QTS 4.4.2.1231 on build 20200302; QTS 4.4.1.1201 on build 20200130; QTS 4.3.6.1218 on build 20200214; QTS 4.3.4.1190 on build 20200107; QTS 4.3.3.1161 on build 20200109; QTS 4.2.6 on build 20200109.
- Published
- Oct 28, 2020
- Updated
- Aug 13, 2026
- EPSS
- 28.4% · 98th percentile
- CWE
- CWE-20
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Report tools
Action score
78
This week
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- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 30 / 30 · Listed
- EPSS
- 9 / 30 · 28.4%
CISA SSVC decision
- Exploitation
- active
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
Actively exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on May 24, 2022. That signals real attacks, not theory.
Remediation deadline for government agencies: Jun 14, 2022.
Known to be used in ransomware campaigns.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| qnap | qts | cpe:2.3:o:qnap:qts |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- qnap qtsbefore 4.2.6
- qnap qts4.3.1.0013 and later · before 4.3.3.1161
- qnap qts4.3.4 and later · before 4.3.4.1190
- qnap qts4.3.6 and later · before 4.3.6.1218
- qnap qts4.4.0 and later · before 4.4.1.1201
- qnap qts4.4.2 and later · before 4.4.2.1231
- qnap qts4.2.6
Versions reported by the vendor
Affected version ranges reported by the assigning authority (qnap). Independent of NVD's CPE analysis and usually ahead of it.
QNAP Systems Inc. QTS
- unspecified and later · before 4.2.6affected
- unspecified and later · before 4.4.2.1231affected
- unspecified and later · before 4.4.1.1201affected
- unspecified and later · before 4.3.6.1218affected
- unspecified and later · before 4.3.4.1190affected
- unspecified and later · before 4.3.3.1161affected
Same product
qnap: all recordsOther highest-scoring records for the same primary product.
- CVE-2020-2509Command Injection Vulnerability in QTS and QuTS heroKEV79This week
- CVE-2019-7193This improper input validation vulnerability allows remote attackers to inject arbitrary code to the system.KEV73This week
- CVE-2018-19953If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code.KEV63This week
- CVE-2023-47218QTS, QuTS hero, QuTScloud60This week
- CVE-2017-6360QNAP QTS before 4.2.4 Build 20170313 allows attackers to gain administrator privileges and obtain sensitive information via unspecified vect59Plan
- CVE-2018-19943If exploited, this cross-site scripting vulnerability could allow remote attackers to inject malicious code.KEV57Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Published
- CISA KEV+572 d
- TodaySep 30, 2026+2163 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-20 · Improper Input ValidationCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
- Buffer Overflow via Environment VariablesCAPEC-10likelihood: High · High
- Server Side Include (SSI) InjectionCAPEC-101likelihood: High · High
- Cross Zone ScriptingCAPEC-104likelihood: Medium · High
- Command Line Execution through SQL InjectionCAPEC-108likelihood: Low · Very High
- Object Relational Mapping InjectionCAPEC-109likelihood: Low · High
- SQL Injection through SOAP Parameter TamperingCAPEC-110likelihood: High · Very High
- Double EncodingCAPEC-120likelihood: Low · Medium
- Subverting Environment Variable ValuesCAPEC-13likelihood: High · Very High
ATT&CK techniques
- Obfuscated Files or InformationT1027
- Masquerading: Invalid Code SignatureT1036.001
- Steal Web Session CookieT1539
- Subvert Trust Controls: Code SigningT1553.002
- Impair Defenses:Impair Command History LoggingT1562.003
- Hijack Execution Flow:Dynamic Linker HijackingT1574.006
- Hijack Execution Flow:Path Interception by PATH Environment VariableT1574.007
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
- www.qnap.com/zh-tw/security-advisory/qsa-20-01
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2018-19949
Vendor advisories and official records. Exploit/PoC links are deliberately left out.