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Fencer Vulns
critical 9.8

CVE-2020-2509 kev in the critical feed json

Command Injection Vulnerability in QTS and QuTS hero

published 2021-04-17 5 y ago modified 2026-06-17 4 mo ago also EUVD-2020-22302

cvss
9.8
version 3.1, CNA
cisa kev
Exploited
added 2022-04-11
epss
34.0%
EPSS 34.0% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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

Patch / fix

cisa required action Apply updates per vendor instructions.

  • QNAP Systems Inc. QTS 4.2.6 Build 20210327, 4.3.3.1624 Build 20210416, 4.3.4.1632 Build 20210324, 4.3.6.1620 Build 20210322, 4.5.1.1495 Build 20201123, 4.5.2.1566 Build 20210202
  • QNAP Systems Inc. QuTS hero h4.5.1.1491 build 20201119

Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA patch deadline
  4. CISA SSVC: exploitation active

Known exploited

Added
4 y ago
Patch by
2022-05-02 (4 y ago)
Ransomware
Not known
Required action
Apply updates per vendor instructions.
Vendor, product
QNAP, QNAP Network-Attached Storage (NAS)
CISA name
QNAP Network-Attached Storage (NAS) Command Injection Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
total
Assessed
21 mo ago

Exploit prediction

33.99% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • QNAP Systems Inc. QTS
  • QNAP Systems Inc. QuTS hero

Classification

Weakness
  • CWE-77 Improper Neutralization of Special Elements used in a Command
  • CWE-78 Improper Neutralization of Special Elements used in an OS Command

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.